Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c7b5213c20070f…

MALICIOUS

PDF

79.8 KB Created: 2021-09-16 11:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20e9699a5a23dbdd5f88615132e6f307 SHA-1: 3a5e5b5b72c6212c96e962ec0d173bfab16b7a83 SHA-256: 84c7b5213c20070ff584f5794a8844ea4ed0d77fa322e6a27e4be40613e2a193
154 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. The embedded JavaScript and numerous external links suggest an attempt to exploit vulnerabilities or redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic for scams and phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=play+store+alternatives PDF link annotation
    • http://duquenne-moteurs.fr/webroot/upload/files/33986444843.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/31008403333.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/juvukizitizosato.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/95934893531.pdfIn PDF document text
    • https://lideregitimpaketleri.com/calisma2/files/uploads/43529341107.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/47244064125.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/voxajowogudanepudaf.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/9239339405.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/bakadowafebifi.pdfIn PDF document text
    • https://506hlapeta.com/files/file/84021810211.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/mitelaj.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/46678717479.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/26348403874.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/55243756596.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/91126994764.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/fedabovafeg.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/fcc3176c563680d95d1b2449c7ff9a52/67136993363.pdfIn PDF document text
    • https://lyubomiradineva.com/files/file/fegelezaxewi.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/79477879549.pdfIn PDF document text
    • http://savemaxint.com/files/file/gerelowesa.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/mokoxeluge.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/28806803322.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/girabalefunadofizilekeniw.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/48658063820.pdfIn PDF document text
    • http://wohingltd.com/userfiles/81526622669.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_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE9 16820 bytes
SHA-256: 6377eda36cd7320a51de0b138ef33e502b8328e8022b1d38a7ba09c55828fa52
font_02_sfnt_off00011a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5A 10284 bytes
SHA-256: 62aa20c5a2f34ae378b3e817d079c66a8d467397ad9e244b780946bf5135e612