Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4d5ea3258d55bd…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 01:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ecf27c38211c654d0a98bcdcb93a28d9 SHA-1: 18b17ecfcfa74530830b7a049b35fc1e49cfe251 SHA-256: fb4d5ea3258d55bd62e0175df58d061c00c2071aaab0c2971c0f54697e82f1cd
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious or phishing content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://strandedtattoo.net/file/vokotuvasal.pdf In PDF document text
    • http://amandatravel.com/userfiles/file/22417269329.pdfIn PDF document text
    • http://carszana.com/image/upload/File/begipixega.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/vuvotegizo.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/gf75le2ha23gfgibuak81if4ui/65574627088.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160813cc9bf54a---folanadakag.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/nilogili.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b386ac3116f---madenitaguluz.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b5de87f2d5bb0a22ed135dcad344f060/10813143138.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ja0npcdjn2m3l80qgdqlv62gn7/paruvuse.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/48625886531.pdfIn PDF document text
    • https://go2germany.ru/files/file/wasekonitumituxonetosizob.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/jrtb3q1kfptse8k5ds8cshjer0/88837837676.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/15345911362.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a1d1b9f5f---83036361542.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34f7a03e4f---19065336683.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mjdhoht86jhl6ffra5ps6cqdbe/kixuxiwoguwigososut.pdfIn PDF document text
    • https://hgb.se/filer/file/padefiwugalesaxemasojoz.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16093015757b78---37306269879.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/femufesegapuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=what+is+my+lucky+number+based+on+my+birthdayPDF 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_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 16812 bytes
SHA-256: 2e8061164eeea808793c81df8ab84f825af0d018e0661e5b151783ffda9b687c
font_01_sfnt_off00011c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 11076 bytes
SHA-256: c68d438feb17594c70ce0bce87fb6a159275f43f4104ade51fac63eaf7bdb3ce