Malicious PDF — malware analysis report

Static analysis result for SHA-256 967aa26ff68163f6…

MALICIOUS

PDF

91.3 KB Created: 2021-09-05 12:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6b5e60dfe8079da64796a4d6db0af676 SHA-1: 2a119911db4a38d1dbdcfcab34d5369e4d5f5280 SHA-256: 967aa26ff68163f62f16d08ac3f58b386f0bce6d6c4528a980373279e963ca16
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number for fraudulent purposes. The numerous embedded URLs pointing to compromised websites and disposable hosting further support this assessment, suggesting a phishing campaign designed to trick users into fraudulent interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • 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://pistant.ru/uplcv?utm_term=apeman+dash+cam+c450+user+manual+pdf PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/85708de31af03c22403897a29d7fd649/78161693372.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/90239768562.pdfIn PDF document text
    • http://atek-ent.com/upload/file/96536375545.pdfIn PDF document text
    • https://new-baby.me/userfiles/file/52708702456.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/29850114098.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/838ad7192364d6023c1cc9d9f85d4706/nalogoli.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/ziridozotujiletetunopox.pdfIn PDF document text
    • http://deforma.it/userfiles/files/xegaseveparomomujake.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/91814989065.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/n6oa5o21qpg0jicas7mv4dn1d4/62016438905.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/47843430493.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb91534cf4---rijapepebiduzaxiwomo.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/supuvalanuzujon.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607af54e3e1d9---fiwabavunobadumeral.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/37707598976.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/volupetusokejuximonesiwu.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210803_181926.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832858d7670---51464260747.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/zuboralup.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/5bme1dri8t176kh469thfvr5o4/21166372572.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/35aedd7eabc071d536654f99fd72fc04/josola.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b75c2ecbabe---nomekuze.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/tetuvevabukelo.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c930705fa5c---judurivamisarese.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_off0000ff1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1B 17916 bytes
SHA-256: 527b1b0b0a26537325b3baad70e1e11db849f08e9a28ae73f2432d1f25a38592
font_01_sfnt_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AA 10988 bytes
SHA-256: 6407c9db8e08af1b0fa3922f3ee1d370b79d631e7f9c7054310081c78491415b