Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab5eadad7879fb8…

MALICIOUS

PDF

80.2 KB Created: 2021-03-24 22:33:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ebaa2f5e2c292c6fa65e80af50372421 SHA-1: 0976b5246df3ce3192524664872bd9661eaeee65 SHA-256: 2ab5eadad7879fb87dd55e076dfec74f7b51558dda610a9deff809341dcbfb44
156 Risk Score

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 0.9998

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://golowaki.ru/strik?utm_term=how+to+apply+decals+to+a+tractor PDF link annotation
    • http://ruszaimclub.ru/150667349347rnkn.pdfIn PDF document text
    • https://cdn.sqhk.co/wugotiparo/0hhiaeO/27004937220.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/Thhjdhe/87675166540.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/xojogupewibedez.pdfIn PDF document text
    • https://fawewetipe.weebly.com/uploads/1/3/1/3/131379545/e2476b3f57.pdfIn PDF document text
    • https://kabigupux.weebly.com/uploads/1/3/4/4/134442156/jefiwibe.pdfIn PDF document text
    • http://reweder.site/old_hot_rods_for_sale_on_craigslistp2m1f.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/jhEidhh/la_pongo_fina_lyrics_in_english.pdfIn PDF document text
    • http://erkutungotu.com/43259942907pavmp.pdfIn PDF document text
    • http://ipoteka.net/503479794249brb0.pdfIn PDF document text
    • http://nubolutlion.xyz/future_tense_english_grammar_worksheetasq94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_6205ba0afda44a58994e83cda5fd1589.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/uu_amdal.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/45549842790.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/39443959849.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/powerpoint_org_chart_template_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/fishing_levelling_guide_wow_classic.pdfIn PDF document text
    • https://5366dd3f-28a3-4342-b8e5-5bed86455aec.filesusr.com/ugd/a92322_51cddbeeb8be4c7fb89daea536c4c56d.pdf?index=trueIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_2e588e2ddf974013bae0acc4c66a35dd.pdf?index=trueIn 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_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 5220 bytes
SHA-256: 31b70a966809912c6ec1d37225e3fcb2b0bb83e2daaabedc300209aa0627dc69
font_01_sfnt_off00010d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2D 11312 bytes
SHA-256: 5d2bf1314ebfe33e7d68816ddf1111d545f3d4c979ed3a257404345a332a54e8

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