Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60353ce5a181d45…

MALICIOUS

PDF

76.1 KB Created: 2021-05-01 20:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4ef8b6dc8bd3ed8fab77e78a1b6e9746 SHA-1: f926f6cf72b20f6107bb42177bf2e5ebc207ff2a SHA-256: a60353ce5a181d457817f4629b8341848bacbd046fe43474905f510a47b6f186
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing operation. The presence of the URL 'https://gimoguvi.ru/strik?utm_term=how+many+cans+of+sweet+potatoes+equals+2+pounds' points towards a potential scam or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=how+many+cans+of+sweet+potatoes+equals+2+pounds PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451561/normal_5fd08d1a759da.pdfIn PDF document text
    • http://air-calm2.club/lijagomuboknp8b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_606356dbeadcd.pdfIn PDF document text
    • https://renobulog.weebly.com/uploads/1/3/4/4/134464004/peremarotipazo-lokokaxojodeka-gitefonob-voranilota.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/cancer_de_pancreas_endocrino_y_exocrino.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/nogosu.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/vavabojate.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/4830f.pdfIn PDF document text
    • http://redtea.space/how_to_write_a_grade_8_book_report38mk6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_602d04b86d7cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mulerux/nazm_hikmetin_iirlerinden.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/pimafub.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/dakukiditapepebotosa.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/pufomedukabuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/dariserop.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/gi_thuc_metformin_stada_500mg.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/chartered_financial_analyst.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 5620 bytes
SHA-256: c7c911beb3b1507f221e4cd2b1fe275302bfa5110bcaf72e4c81f16976048186
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 12312 bytes
SHA-256: ebda99e5de820d846e2f98814bea0d5f20cc41c40b88907f6b68c86aae78ca9b

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