Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c412a58a1b04d25…

MALICIOUS

PDF

96.1 KB Created: 2021-06-26 15:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f616364a70562a68cabf07ed2c9dcb24 SHA-1: ca8c090866161970f5ab199dae59dea9eaed3aff SHA-256: 5c412a58a1b04d253211aa5598724a94ee372f9551c9deb113665bcede45355d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/98394a5dfb62a24be309b746864dad4b/puvotiwigugejod.pdf In PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/ca90bd15009cf971453dc08d32e3378a/86450376694.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/vur0s7m6ube7vaikekcq6gb1j0/dilarulikazo.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c641e2539d1---51608786776.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bc367d45d1f---janibisabozikenavevuk.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/dikalemugegar.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac88127f1c---89209837588.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ed1a3a62b---25496250433.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160794476a3e45---kuzivaj.pdfIn PDF document text
    • https://adikketiga.com/contents//files/zogugavijiravid.pdfIn PDF document text
    • https://mollis.rs//files/zamomazar.pdfIn PDF document text
    • http://learningkey.org/userfiles/7224209165.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078140fd0a08---bokigosopatilatogorap.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/jisavokumana.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/subavote.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/nak60c4fel9ku1ku85i9bt0jle/22367443701.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/170n1vjet0fb6vounvsfnje7m6/budopomuzadujegupatezak.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/87973032383.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5493f6e1d6---69126983435.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1f8e19795---rokulikujurimopita.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/4k6h41k9hhstroru1dersaon11/vewigijalituwusatatetedol.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf28aea1c85---72634981314.pdfIn PDF document text
    • http://amandamaitland.com/images/file/xaxedemorewuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+does+intercultural+meanPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000134e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x134E1 16788 bytes
SHA-256: 8261464790758c70be0f5ec6d3e0f3740a7b2888839235b424bb520c94168367
font_00_sfnt_off0000e6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E6 10728 bytes
SHA-256: 1a447368fdf7aafaf91c1179d8e40829fd36a332543c151fd3f3a848cdbc760c
font_01_sfnt_off0000ff5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5B 21788 bytes
SHA-256: f27cf5263ee6f5f34b162bfd3bb4b802719cd0984865f8a94a9597d9e80b6f98
font_03_sfnt_off00014ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000164f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164F1 2728 bytes
SHA-256: 27dddf81d34accdfff0691b5819923a6ec36909b078f8510cb504c3791bb313c

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