Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d007f613bea222e…

MALICIOUS

PDF

94.5 KB Created: 2021-07-29 12:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 56412b9fcd1a072f9910831006896bed SHA-1: ac9cb453442e2f09e087727096f2ef450ba9320c SHA-256: 7d007f613bea222e5f6f124b802ff8f168cfe815a6e5e58c2f0450d3078f7a81
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users. The primary purpose appears to be directing users to potentially malicious sites, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607448350cd54---95007449310.pdf In PDF document text
    • http://sacoorhealth.pt/site/upload/file/11287590958.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/sogexavepevukusujimusir.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d38b51cc4---megenojup.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160965f770f564---gosexifigixarapola.pdfIn PDF document text
    • http://artside.org/data/temp/file/60344953938.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/dumoj.pdfIn PDF document text
    • http://icsbc.ru/fuploader//file/27399366433.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/wunipos.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/99779614521.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/40865963982.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/8711594588.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/3rogg56fe937c02dgemrm2cl04/23962823260.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/rogomoxederur.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ilvemh7o1d06p2ufftd9ke06s1/89277778556.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-14/20210514201445562042.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/lgstk68rc8eqs3qgk3rj63e3mf/koripitika.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/gau68kvj9rot01qr41jnrtsbdo/63849314917.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/xowifinivuza.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090db0464549---19390470574.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/db54b285b08e04ef7ba0be010e3ef958/garowexodinuxe.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/0c5f0e587eb5a1d6144f76b0f5abf6df/26282360221.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=smok+vape+pen+22+user+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001088d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 16120 bytes
SHA-256: 09562ca2d5000ae2f2345c4ffb282664df80e6add20478162cc85c395b82892d
font_02_sfnt_off00011de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE6 10676 bytes
SHA-256: 1f53d19ab06eef65f19f91db44a47ad9a09ee52f0242b1293ad88dc64d9d8e62
font_03_sfnt_off00013666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13666 20368 bytes
SHA-256: a16b85d56be4b9155ab85887eff0aa2440fb78a826f7adf7ee70949549e9671c

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