Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1705c0ff219b99…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 12:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f23d1904f7b126f5e57c119dda11d0a5 SHA-1: 9a36b7c0ef5865ba160cf2e7aa8af07b8639cbbc SHA-256: bd1705c0ff219b9966ecb390efb274f6585af2c1a68c3a2e7c642410283a71a0
176 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting an attempt to distribute malicious content or redirect users. The ClamAV detection and ML classifier further confirm its malicious nature, likely exploiting PDF vulnerabilities to execute code or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=canon+750d+manual PDF link annotation
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/43faa7c9c6e8d50228d819b81b0a30fa/91062862605.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093d7fd38621---99285533741.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/1613687211.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/47121677137.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bfcd0d1be---54663416535.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e6bc73a1d---52317031899.pdfIn PDF document text
    • http://goozzl.com/userfiles/files/94937203956.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/86991828684.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/g3dq6r12j861hhip8b81qh00o6/konibamenud.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/1420709626.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/vizukalevizudimor.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202161182089898.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/25894221448.pdfIn PDF document text
    • https://viscom.bg/uploads/wysiwyg/files/fegutorilikedikofu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/bufebedaluzolazut.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/texuwopeza.pdfIn PDF document text
    • http://ailizia.com/userfiles/61896936350.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/l39gs8hfa6tuk54m29evpqg1m2/kizurisiguxibirij.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/94556215010.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610e78ea2e9d5---33229021388.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608f489059210---52586559990.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021062619210973499.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/aqh5f0ueg80t1se72ql3l4knd6/77819097467.pdfIn PDF document text
    • https://vzglavniki.net/data/file/wabudaz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 10256 bytes
SHA-256: 4b9f59d1ce3cf9464a81d1481338641245905ef8862e9058e6b81695917c0576
font_02_sfnt_off00010b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 18032 bytes
SHA-256: bf3177820e7ca549fe1519faeb4859f958135bdb101e4c5363f7317c8c218f69

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