Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a13a2de43c0365e…

MALICIOUS

PDF

104.7 KB Created: 2021-04-22 11:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 71ebec6d1b8a3f45f11be617658c8a25 SHA-1: 685c9e69cdceee6b58846500938a9f27c0766a2d SHA-256: 5a13a2de43c0365e0ba2854e4f23982edb399e3fd5d2e9b79d3073f93f2aeb82
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic flagging it as a link farm. One of the primary URLs, 'https://pelibifir.ru/strik?utm_term=adobe+premiere+pro+cc+effects+tutorial', suggests a lure related to Adobe Premiere Pro tutorials. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the sheer volume of external links points to a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=adobe+premiere+pro+cc+effects+tutorial PDF link annotation
    • http://instgrmmverifiedbadge.com/are_power_supply_cords_interchangeablessa5s.pdfIn PDF document text
    • http://kizogadojutenam.22web.org/83343750951.pdfIn PDF document text
    • http://menformula.xyz/insinkerator_badger_500_1_2_hp_continuous_feed_garbage_disposal_with_power_cordi6679.pdfIn PDF document text
    • http://zobuzuw.iblogger.org/freemake_audio_converter_softonic.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://s3.amazonaws.com/kobivimelelo/what_happens_during_an_emdr_session.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/31848950190.pdfIn PDF document text
    • http://foxivinavil.rf.gd/what_is_the_official_release_date_of_the_ps5.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/angina_pectoris_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/65243450388.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/64659985777.pdfIn PDF document text
    • https://5da1c7d8-01c4-4175-bbf8-c25915566394.filesusr.com/ugd/1084fb_f426652ee95f4675b7c73ab8a2a02bd1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vigevot/cannon_gun_safe_lock_change.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/actigraph_gt3x_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/can_you_viber_conversation.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/fz_2009_mileage.pdfIn PDF document text
    • http://mowekejerejo.rf.gd/54810399032.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_19a6d4066bfc41feb3aec5c0ef2680ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kufazete/27413417173.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/79162944173.pdfIn PDF document text
    • http://fugirar.epizy.com/powerpoint_free_templates_simple.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_off00014e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E83 5208 bytes
SHA-256: 1035086dc1a91f3ceb5f16f4e30e5ab4f220dd7d2ca2e1669680605953929d4a
font_01_sfnt_off00016032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16032 11356 bytes
SHA-256: 3b7000c5e3cd232a9e9ba02e0417a44d5f812d1c85601b5b848f36506fa4a76e
font_02_sfnt_off000186bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186BD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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