Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0293a23f8736a8b…

MALICIOUS

PDF

78.9 KB Created: 2021-04-26 08:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74b344bbb6d7d01241e0cd0f65fae1f6 SHA-1: 1614bda7e838794c4764be6cc08ee0e613025962 SHA-256: b0293a23f8736a8bf2910a66b513a7d0613cdceae1b185f2088f2ff53bc36172
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL 'https://xajibur.ru/strik?utm_term=basic+questions+asked+in+bpo+interview%2527' is a primary indicator of malicious intent, likely leading to a phishing page or malware download.

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://xajibur.ru/strik?utm_term=basic+questions+asked+in+bpo+interview%2527
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/4938187.pdf
    • https://cdn.sqhk.co/gejixoneku/k1hgnjc/63524562418.pdf
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/ninakogakal.pdf
    • https://fekubikutoji.weebly.com/uploads/1/3/4/1/134108901/cdae68a340688.pdf
    • https://cdn.sqhk.co/nawamuzimosu/cgfhfwI/breast_pump_flanges_size_guide.pdf
    • https://cdn.sqhk.co/sunomedude/jeibNji/56182001453.pdf
    • https://cdn.sqhk.co/pajubopolak/igchejg/tennis_champion_3d_online_sports_game_mod_apk.pdf
    • https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/legabisokabateg.pdf
    • https://cdn.sqhk.co/leruwexikud/vV17Mid/bubble_tea_flavors_at_home.pdf
    • http://fastcreditreport.info/28905683542n1yfq.pdf
    • http://kwini-fini.online/4734242519parzo.pdf
    • https://cdn.sqhk.co/rivitovolu/jchiDic/wradio_en_vivo_emisoras.pdf
    • https://cdn.sqhk.co/kasesiseb/csyD45T/digital_marketing_manager_jobs_in_bangalore.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wupiwupiwot/nakopujolovazuruwis.pdf
    • https://s3.amazonaws.com/migivewuwe/69450104417.pdf
    • https://s3.amazonaws.com/wujodibu/33373088873.pdf
    • https://s3.amazonaws.com/zunaduxa/information_retrieval_definition.pdf
    • https://s3.amazonaws.com/pulujolatepuv/harris_bitcoin_miner_windows_7.pdf
    • https://s3.amazonaws.com/lomogas/81308178030.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46a.bin
434100b05a253d682fb8fc6349a7eda477f39e2ef07f71f40c8408f0bad53752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46A 5600 bytes
font_01_sfnt_off0001079c.bin
d12bdc71fe175011765a0d93574ee9f69751e9553926a6bf09591ee695bbc05a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079C 11264 bytes

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