Malicious PDF — malware analysis report

Static analysis result for SHA-256 04b370045849ee49…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 04:51:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1292ce26281d7b6c12cb2c01ecd76b81 SHA-1: 9fdb65644b904956bb7422f09342628fd4e1c510 SHA-256: 04b370045849ee490c3ae6307300fa93cd96f0e4d21f1c8dfa00c6a69d7aa5c2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://lozipotod.ru/strik?utm_term=wing+chun+positions PDF link annotation
    • https://cdn.sqhk.co/turomixo/ghjgzje/messages_for_web_not_connecting.pdfIn PDF document text
    • http://jiludedo.iblogger.org/27312475940.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ffebf048419a.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/xjfBSgc/real_life_simulator_pc_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470962/normal_5ff3302f4f47f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5ff3c5fc47c88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394079/normal_60090b71f2e63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gebukil/amazon_music_to_samsung_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171a6dd9-9810-4c48-87e3-9e918ac2e63d/persona_4_golden_guide_max_social_link.pdfIn PDF document text
    • http://daxilutoxin.rf.gd/alucobond_acp_catalogue.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_35c6a66cae1946b4ad1f2781062093b1.pdf?index=trueIn PDF document text
    • http://mopufeva.epizy.com/empirical_cumulative_distribution_function.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/apartment_rental_lease_agreement_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404620d4-d274-40b8-905f-c94d74583842/brs_gross_anatomy_free_download.pdfIn PDF document text
    • https://45884d5c-3037-4093-99f9-9b9c28a1e9f0.filesusr.com/ugd/3721b1_d19fa71958bd49f892495196ca923777.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f01b50f-60fe-420c-bb1c-d27e642e4ddf/91448303819.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/70438108022.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/kenneth_cole_watch_bands_brown.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 4868 bytes
SHA-256: 1043959acd3be7d9033d837bdf9571ab80d958ace3d8cb5c8b8f777dd9eac4bc
font_01_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 10148 bytes
SHA-256: 381bddef6ae2aca446c888d35b943787e0e0ac9f2756b430807d2170ebd93520
font_02_sfnt_off000123d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D5 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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