Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc399478707888d…

MALICIOUS

PDF

82.3 KB Created: 2021-03-04 10:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0a0cf8bafb4c37d695eb21dd3cbe2168 SHA-1: 6f061c5b38b00725363df6d245b2b37979ee6a6a SHA-256: bfc399478707888da59bdf55fbc11e3930b7e52164bba2e16beaf17f2847030b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' which is suspicious. The document body, though heavily obfuscated, suggests a lure related to popular search terms, indicating a phishing or malware distribution attempt. No scripts were extracted, but the presence of multiple external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=the+lord+of+the+rings+complete+book+series PDF link annotation
    • http://dakajak.medianewsonline.com/what_type_of_oil_does_a_toro_snowblower_use.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_602affdb84d4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5ffc2bd8dec60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492246/normal_60214d6122978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417658/normal_600095d12b59b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408176/normal_5fca8efadf52c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_600ead0c89072.pdfIn PDF document text
    • http://ita-yog.space/6936918933hozx1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_6030893079d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_603c3a58a144b.pdfIn PDF document text
    • http://maewallace.com/2007_scion_tc_owners_manualzzrg0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409000/normal_5fc762b7aa1d0.pdfIn PDF document text
    • http://fresh-ita.space/pubedis234cj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_60304c3d72711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_60141fea501b4.pdfIn PDF document text
    • http://babysampler.com/78936606050pehi1.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
    • http://gegawuwiru.epizy.com/bodybuilder_diet_plan_for_bulking.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/what_is_hardware_short_definition.pdfIn PDF document text
    • http://kokidali.rf.gd/bushnell_450_telescope_manual.pdfIn PDF document text
    • http://gezixus.myartsonline.com/the_outsiders_anticipation_guide_answer_key.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/83331724348.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_off0000f72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 5300 bytes
SHA-256: 21a7487ee9cf8dcc33ff28cdad00f411470876f37683e48ddf16f000513e4dc9
font_01_sfnt_off00010908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 10520 bytes
SHA-256: 9f7ab4b2a27785a4ce6758f9e932ac840f4cd225882eeaca7c0177455549ef66
font_02_sfnt_off00012d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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