Malicious PDF — malware analysis report

Static analysis result for SHA-256 60cb1521bc6a8f61…

MALICIOUS

PDF

70.6 KB Created: 2021-04-19 17:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 369fbcf4c6f77c44dc27710cbeed1c10 SHA-1: 548b3ba70af3f4fd7e3d2a953acfdb41da788856 SHA-256: 60cb1521bc6a8f61359d40866eb5a1ca680df8d1bc2ecda29e249d9b64773d69
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=after+the+fall+movie+trailer PDF link annotation
    • https://cdn.sqhk.co/vumulevezuf/gedCe3B/samsung_tab_warranty_check_by_serial_number.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/8919c2b1f.pdfIn PDF document text
    • https://xonatiwomunonow.weebly.com/uploads/1/3/1/8/131856992/3428408.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/viaXhhf/94316762366.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/wizitifowubux/benadarulosapipeb.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/78934010553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c930a508-4982-4d80-b20f-6af805adde99/jesus_you_are_the_centre_of_my_life_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/studio_5000_structured_text_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25361670-b60c-4c4c-a44c-2864a3e4cd81/how_to_use_adobe_acrobat_pro_2017.pdfIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_55c3af8823de434f89a5786e84228221.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/rubber_band_exercise_chart.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_a23cf1eac499428b972aaf7aa9a52deb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/pifunajowagigugez.pdfIn PDF document text
    • https://b47237a6-1880-4d87-9598-f01162bab054.filesusr.com/ugd/1fe0ea_41745c5e24314168be6fc70f3ee5c245.pdf?index=trueIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_b8da18b1341e43c1af8946c54f50e60a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a953ee4b-a464-41e9-8aa0-05dae1eb350b/95549346479.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/rolezuwetu.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_off0000da17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA17 4876 bytes
SHA-256: cc5a8aed70e27288e2d5c9ca978ddd3c53b0e7969559b066ca15a3404374fd24
font_01_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 10084 bytes
SHA-256: 3d4f16831f65aefe5549d534ab36d1972bf431c754d755720ec72cc551beed60

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