Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fd00ce047580ee…

MALICIOUS

PDF

97.1 KB Created: 2021-09-01 07:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 25d868bf0d73a4a1df20049b3f4f4e69 SHA-1: dc24641015207cedf65a5dad58cb2f6eeba99c89 SHA-256: 48fd00ce047580eeaacdb64d7857dc7dff87d8aea71470b84fe7378b1d97537b
196 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to other PDF files hosted on compromised websites or disposable domains, indicating a link farm designed to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this PDF might be part of a multi-stage attack where a password is provided to decrypt a subsequent payload, further reinforcing its malicious intent. ClamAV detection confirms this file is recognized as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://kmsenior.org/file/files/wuxawor.pdf In PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609d015d7cd82---besirijegame.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160985324ac4ef---81733897172.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8bd0d2835f9f189ce890e4d6571a8400/93404776982.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/39578818237.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/44399016348.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/nesefu.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b773426cd---sogavi.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbf3ee87e0---gujodutedojenuzufawape.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161284752845c1---74671086435.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-08-09/images/files/42466702287.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160892cd7b56a0---saxalujimenanawidu.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/gazamudu.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/87002255308.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/98db1948497208e6fee279a63dba08fe/52591240131.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021072812414173499.pdfIn PDF document text
    • http://megalaserasia.com/upload///78759665671.pdfIn PDF document text
    • http://dhs1959reunion.com/clients/871764/File/jubaj.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/c76c6e595e18a11e1f0e30d5ecd20083/84224365515.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160937d274792e---faropuwokikitilomoxabo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c667410f189---24464784445.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/6tspi7sdmeb84ksi7d693mdpmu/kovoberugarutiwezexekajo.pdfIn PDF document text
    • http://funperm.ru/content/file/wafinuzuvodipari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=java+online+test+with+answersPDF 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_off00011441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11441 19288 bytes
SHA-256: 8e23f8c81026a64be7dab16373ec0257ebc4c8e95801a28a0c38f456429ef91c
font_01_sfnt_off000146bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED2 10348 bytes
SHA-256: 367924036b54e5ff7635726c161ca66616491e6f9cad5559f99708b6a57048ee

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