Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab1fea722fbae5c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-30 10:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ab37c7f5825731da04fb339a577a6a SHA-1: ec1f734a947ef2501dd6315db60cbb6b9277cf97 SHA-256: 0ab1fea722fbae5cff69c62c6cc70bed028bb5b74820fbfc1e0ee881575473d5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF contains a large number of external links, with one prominent URL pointing to a domain that appears to be part of a link farm or phishing operation. While no scripts were directly extracted, the PDF structure and the presence of external links suggest it's designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=ktm+990+sm+service+manual
    • https://cdn-cms.f-static.net/uploads/4475854/normal_6038d0aec3879.pdf
    • https://cdn-cms.f-static.net/uploads/4478137/normal_6029919dcde5e.pdf
    • https://cdn-cms.f-static.net/uploads/4423429/normal_604ced37155c9.pdf
    • http://sodaapp.club/solar_battery_tender_walmartpjg6r.pdf
    • https://cdn-cms.f-static.net/uploads/4420034/normal_60208d833b8b7.pdf
    • https://cdn-cms.f-static.net/uploads/4458856/normal_601683f836424.pdf
    • http://webmastervlad.ru/how_much_does_it_cost_to_service_a_volvo71xx6.pdf
    • http://trokot-shopnew.online/rolilolobimujuzopitufigunwumcj.pdf
    • http://bikelumonekodex.mygamesonline.org/cement_manufacturing_dry_process.pdf
    • http://picply.ru/vovixefudilh2dw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_42b4bc9f8258475aa4893aebce90e99b.pdf?index=true
    • https://s3.amazonaws.com/dozore/how_to_control_netflix_with_alexa.pdf
    • https://s3.amazonaws.com/mukut/free_printable_sheet_music_for_piano_beginners.pdf
    • http://resilasijajatil.myartsonline.com/25008076916.pdf
    • https://s3.amazonaws.com/feliso/bhajan_odia_new_song.pdf
    • https://s3.amazonaws.com/kuxuxemu/xaxurelo.pdf
    • https://s3.amazonaws.com/jezaxojipevu/wofuvitojumobezam.pdf
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_1b0f89956cb445eda115c220ee14d459.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9cd.bin
c8c331f3254a4b2b890bf8b49502a67eb65822065669a2e433de66e273b34687		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5272 bytes
font_01_sfnt_off0000fbac.bin
6908b4d95ce7930d14b4f186a5836142883086bd9b23ff7e31052bad775bbe89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAC 11308 bytes
font_02_sfnt_off0001225d.bin
cab0398e3f282db8df8ee7224df0619fbc6b67f81493afdba6d4f29ecc3f2809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1225D 16144 bytes

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