Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eae2fe56b3a22db…

MALICIOUS

PDF

85.9 KB Created: 2021-09-01 23:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee195d9f388766a1607a16ac4d787f00 SHA-1: 5c5d88410d49894c5e34f5ea67c2bb5760561fe1 SHA-256: 8eae2fe56b3a22db999ebb71a7cd0d6181bdf291dea5aaf34df5168e3127a815
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irlanc.ru/uplcv?utm_term=euro+to+philippine+peso+exchange+rate+today PDF link annotation
    • http://omeofest.eu/userfiles/files/beterivafapawetato.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/12949829437.pdfIn PDF document text
    • https://smartbrand.ro/mm/file/bomowapuburinajekebofepi.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/xididewo.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/3dsr90pt213dth4elbgmk06lo0/fulonisizixelorusa.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/19031089692.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/5920001451.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/99438663527.pdfIn PDF document text
    • http://ewtch.com/upload/files/devavowigunofasavan.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/6647abc421e3f944ec4018c40609f779/40847162182.pdfIn PDF document text
    • http://skomi.ru/img/files/file/mamezirifim.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/8047355007.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/ponagukaluxirotebe.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107060542065511.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d7qnkcnsnnh5msiadmru4epfm2/57787078173.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/esed6151s3v2dd9uugeqal253v/pabowubazuk.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/28a5c3818a5cc5ba9fb37f08c0e493b3/52546904835.pdfIn PDF document text
    • http://medrea.ru/upload/files/netejotufebibuvuwiretol.pdfIn PDF document text
    • https://luminex.pl/upload/file/gikemedonafebikibivopi.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/wozuxofofoxigetesekid.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202108200506363266.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072462934f02---92791256236.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/3a5012fc6ebda21a8157a707c2bcab42/42286456052.pdfIn PDF document text
    • 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_off0000e70a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70A 18552 bytes
SHA-256: 20b0eb7f3e372768440e66eecddf19d54076bbde915af2a39b818fb4e61e2214
font_01_sfnt_off00011816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11816 11092 bytes
SHA-256: 20e2b09208bbe63a1da957d29c15d22f1f122d62bb1f31b4ab31d8f34e45239f
font_02_sfnt_off000131ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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