Malicious PDF — malware analysis report

Static analysis result for SHA-256 db926967b4b85f12…

MALICIOUS

PDF

84.9 KB Created: 2021-06-29 06:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 88bb982d29e7190325926f178b63f812 SHA-1: f9a4b36f7de456acbaf818990db191fc851a3bdc SHA-256: db926967b4b85f120988d882136b83b3ddd7abf8094cbe7381b77ba3e516b171
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Internal Spearphishing T1204.002 Malicious Link

This PDF document exhibits characteristics of a credential phishing attack, specifically impersonating PayPal. The ML classifier strongly flagged this sample as malicious. The document contains a high number of links, many pointing to compromised CMS upload storage, and includes a call-to-action button lure, further supporting the phishing pretext. The primary IOC is the link designed to harvest user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+download+play+store+apk.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4964f4d89a---95976063814.pdf In PDF document text
    • http://englandmatchshirts.com/assets/file/32933317688.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/luxigoporavixipirana.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/8883fd8bd5787373db98c44078c05614/59515563708.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/ced20ca137e0389dc8e3a487ab0a07fa/digowevaroraliz.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/guputozumutemolipuna.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/44999235787.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/guxilomefoje.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/15d940fc7b866ee19a54e7cf4ec90111/3696660148.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/26f5d6cce45cdc25c8b41a64e625ab38/11289298387.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/0f65e4f87cfba2406e257c1f6bedcb1b/sokijesagewesusiji.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/290120199701.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/sazuz.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f706ceaf1---79401532250.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c41d6c49a---sekubofugeberejebanewudal.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2784a17332---kojawosawisemotipek.pdfIn PDF document text
    • https://manenshop.com/upload/files/nimirovoretefoxoda.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e934b756---jogopitatagutinux.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/631e342d03f5a1d0d95b7c3f7c006b1c/tozivuzorage.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acd14949128---88409994129.pdfIn PDF document text
    • http://huron81reunion.com/clients/f/fe/feec28e48c841af8be4ad6373737a022/File/27757046558.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/778f3a367e457179930410adba932934/wevimutazefesogog.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/9a33702cce18d95a823a53aa8ee7ae16/70163521485.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+download+play+store+apkPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001017a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017A 16932 bytes
SHA-256: 64c0f99e1c6855bada599e578ff8a2c52ecff006c58036c7aee53e25ade1f8c8
font_02_sfnt_off00012ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDD 10576 bytes
SHA-256: 82cd6ab626de0bfe19dd27bf4c7823494b71f9103f5debdb6f10aca140c57b45

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