Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3312948d014b215…

MALICIOUS

PDF

92.8 KB Created: 2021-06-27 20:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 41afe2dc2e53cf8a3c1911dc5cb89d16 SHA-1: f6ba940825d35d3036df3ad69b4dd3796dceedf3 SHA-256: c3312948d014b215933b04d87e65bf0c7d7b05205601545e7aee1d5a9300608c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm, with numerous URLs pointing to potentially compromised WordPress sites. The presence of external URIs and the nature of the link farm suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/6va7foupuuqvhm75urnattfa57/95720625690.pdf In PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ef5958704---befenumeposulosiditutenog.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/kinidupigegetorukino.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/rotatovefe.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ed1d569c94e984492e8752a10a5625a/35625770138.pdfIn PDF document text
    • https://zzarosiscarampola.it/file/31214239401.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/jj46klapjaq500cg4ugb4ljmpk/32610038901.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0fa9f094c8135eb2d4369ec663778b14/buzosobetazafimumikokute.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dfd0eb8f5---94427938947.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/be1539c5f874ce600a8262fb39e702b4/16539204296.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/rjdo94qcmjra6tlnoupkrgabue/datuto.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ba703b96c---sudawukikixekenikovir.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/k9kcfpofc60duqd51kibdiuno9/3224269148.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e8167a40e23d21f05bc14cef436e0102/vitelozovugisufuvivelere.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c5a2953904044292cf6f2cdf46c1f79e/40062548998.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/06/files/210618112002.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/489a4ee64a0e335f0e3485f820a5475e/kajezififosudimobitonazi.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/b27346c60bc9520b788204684c13b4bd/guvonejedujabadipos.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/dba3596b28d6894e30bcb31765f45e7e/dapawufozomamapop.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a96e71cf054---30251324716.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0cf3c47d6---68540417464.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717b43dcd7e---kubajirivare.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/golijejozonugezomelufen.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbfaec2cb7---tetetesijonuk.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfd66ec168---69163357913.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=weak+point+and+strong+point+in+interviewPDF 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_off000106f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F8 10756 bytes
SHA-256: f7e0b5e2403195c723510eb8963839b08bf3ef7038454ed62ac4482f9882d94f
font_01_sfnt_off00011fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB8 17936 bytes
SHA-256: a2b84a8aee24c6121be72b5de326f67996e3ee6ecc209a5e5dc0dc546ab8512a
font_02_sfnt_off00014dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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