Malicious PDF — malware analysis report

Static analysis result for SHA-256 08da5c3c8ee8513d…

MALICIOUS

PDF

88.2 KB Created: 2021-06-29 16:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 18db83d1fe6433ebe87a8c6ba748d38a SHA-1: d691d4d3f4cf833b11901bc66248cef1f6ae17c6 SHA-256: 08da5c3c8ee8513d21057551bb259d0d0dedb73fcc0d1a6bad0de32a081cb473
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious sites. The document body is unreadable, but the heuristics indicate a link farm strategy, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c94b1fc6e---mizamemusisoriv.pdf In PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160adb48b1ea58---73900190750.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071ceacce14f---xilewekasunasuvixev.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-4/20210504095347440620.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/92000264869.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef8e5bf01---rilovesefopokofiv.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/tobuxikinew.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/waxugofobasobibufivivim.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/fetuzifamenoravawi.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/3009167561.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f2159f4a5---somegotamisokexoxaluderam.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ba57098e---58369733208.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wivulupojikakuwawel.pdfIn PDF document text
    • http://fitviewer.biz/files/file/17497837595.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/gawutagutodagelijirenuge.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607796bbe20d1---34295951274.pdfIn PDF document text
    • http://lawngo.net/fckfiles/74166782792.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a32bb187---jotimajunugovudefu.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3a53324777d94e2b9b9758785bee4267/22561441814.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/fevizalipatugirefazofizo.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2df46be03---ruximidusi.pdfIn PDF document text
    • https://magatek.com/documents/file/83306744726.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/a3ebf6945875603868cd0de62cfce7fa/57826677936.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/21533142592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=i+got+stung+by+a+wasp+and+it+itchesPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 17496 bytes
SHA-256: 82b9c5db8ef819559b633a96f769186e4442aecc3a3fc9ac5811c31bf5ba0dae
font_01_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A00 11036 bytes
SHA-256: 524930a056bffb63aec03e0a7eb29fb55248f119e563cebe31038a23a545b790

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