Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0a460ade7a5724…

MALICIOUS

PDF

108.5 KB Created: 2021-04-07 18:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2a37ac69bd90ced6a415efe58a470565 SHA-1: 230f20f81e1f0fe0f9b73802b09cf43c495a6b85 SHA-256: 6e0a460ade7a57243fba658db7b17856e00082872ee00bdf0927a0fc8a5e8508
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farming or redirecting users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users by directing them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/strik?utm_term=jungle+book+names+language PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419451/normal_6069250c0cd3e.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/FmLbian/98542781325.pdfIn PDF document text
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/pimogagaluru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_604d74bfbaba0.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/2127845.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/jjTHEBh/england_hockey_training_programme.pdfIn PDF document text
    • https://cdn.sqhk.co/kepozote/wvjcrjb/internet_video_er_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458824/normal_6057a1be45175.pdfIn PDF document text
    • https://posilukununafux.weebly.com/uploads/1/3/4/4/134498017/widozofejexukizofibo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393364/normal_5ff11e5f61a4c.pdfIn PDF document text
    • https://kuzirorox.weebly.com/uploads/1/3/0/7/130775715/1903102.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/hpVjajc/9340029205.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/fozugovuvedadeviwife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/game_backstab_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/74682051362.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/azar_for_pc_windows_7_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/guideline_stemi_aha.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/35817935653.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/cognitive_bias_codex_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/air_force_question_paper_2016_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/73543607517.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/kia_cerato_2012_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000146ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AB 5100 bytes
SHA-256: d146708bd9a75fd9a0336a998a25c1da77c0438c5aaf198af9cf25cbc313de29
font_01_sfnt_off00015800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15800 13992 bytes
SHA-256: f4dc34d9bc3ab33a451cc41bfa51319f7491081dd50e495c281dfbc38aa26277
font_02_sfnt_off000182e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182E1 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off0001984a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1984A 2888 bytes
SHA-256: 4923000db20d9efd5ed6b1dd62ba3d4cfa3f256aba4c10f6fdea48cab6bab17e

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