Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4508a542b546a9…

MALICIOUS

PDF

80.2 KB Created: 2020-12-22 14:39:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5e02481e5a12445dacb0b7b9aba01fda SHA-1: d3ba0dfdb90f513ec8d639d9c1dec6ae7d671c9f SHA-256: 6c4508a542b546a946daaadf09f46262351a05658114889a2cc5ef63dad672e5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, flagged by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. One of the embedded URLs, 'https://trafffi.ru/123?utm_term=dell+precision+m4500+user+manual', is suspicious and likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://trafffi.ru/123?utm_term=dell+precision+m4500+user+manual PDF link annotation
    • https://kiwusaxanasatip.weebly.com/uploads/1/3/0/7/130738973/6607285.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/fugipigevafe.pdfIn PDF document text
    • https://bolefapazudakaj.weebly.com/uploads/1/3/4/4/134478960/64fbd0dbc69.pdfIn PDF document text
    • https://pawikewam.weebly.com/uploads/1/3/4/4/134445239/3288436.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/rezibu-wujikusa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0be4612facd59ceac2d5b/t/5fcafd470814be4f73e134d5/1607138633197/covid_virus_statistics_per_state.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe0042f51e6b539731e500c/t/5fe0181e1c66f52f5fb37e9a/1608521759513/81015163632.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe11ea9ae67b0396610897d/t/5fe16962b913682061609cd7/1608608098807/u_dictionary_app_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c274a508b35dd5dc321/t/5fdcfc9b6ad3a50fe3ff23be/1608318107039/bofrost_katalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deeed82c-079d-4f70-85b8-b123a3b7b350/pisudobogetekuna.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27dc8a13a450babfe361a/t/5fc40f073c02f22b9d8bdc4a/1606684423957/44793094552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c613b0d-6e97-4d0e-a0a7-e533adc54485/33472217555.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf49337acac6192ab6cf2f/1606371636514/14206019971.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/xabikisodaxutumowekatanu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d33427a199023ab4f616/t/5fc9466a59093a79be16cdfb/1607026286453/king_tower_13_clash_royale.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 5236 bytes
SHA-256: 4969c6e424f151b52a909f6bf75fe34ec0714f1691b9f2090a75ea7e5081d268
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 10968 bytes
SHA-256: 1e5772087141203965953fa6a8ab179d07dc3f792d9f74ffeb407b942d18eca3
font_02_sfnt_off000125c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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