Malicious PDF — malware analysis report

Static analysis result for SHA-256 44beb960543914c2…

MALICIOUS

PDF

78.0 KB Created: 2021-02-09 01:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0119f316a4f2469326a26245fd91e74f SHA-1: 1debb1352455ef5396469b5de4297cbd34f1e53c SHA-256: 44beb960543914c27db284b0d26be0fc72526d22fc07591d91995fb9a199a753
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful external sites.

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://jacksth.ru/wb?keyword=challa%20song%20%20mr%20jatt%20ninja PDF link annotation
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/a0d70b0121c.pdfIn PDF document text
    • http://zijogodakenanaf.22web.org/asana_meeting_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/dG01hbc/20244416447.pdfIn PDF document text
    • http://nunixofu.22web.org/evermotion_archmodels_collection_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/jwK32gd/wafutovosup.pdfIn PDF document text
    • http://foodguideblog.com/rogonaripokugidimogideqzxvy.pdfIn PDF document text
    • http://rcasino.info/brownian_motion_animation8bknl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387408/normal_5ffc48ccc8488.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/gexabux84gg.pdfIn PDF document text
    • http://ewwe.space/273_plantas_medicinales_de_venezuelasvfcb.pdfIn PDF document text
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/8a381.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/lowosizubosazenamarijo4t5cl.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/vexosafugunu/buparomusobejumuvevusif.pdfIn PDF document text
    • http://dufobilubaxa.rf.gd/argos_bed_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/28025340400.pdfIn PDF document text
    • http://tobisijukufoki.epizy.com/rewugifabebof.pdfIn PDF document text
    • http://xegebasitez.rf.gd/28019308399.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/flashdance_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/muvigusavumivanom.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_off0000cd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD62 10472 bytes
SHA-256: 2d6708824f0dd5a8ec0acec40e4235459a7ae3453a8cbabbb92a47c0a1eac5ab
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 5080 bytes
SHA-256: eace4ab64dead156f9df0bc5a623a09d0abc3f7c3ddb48813aa56bab9c377807
font_02_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 11448 bytes
SHA-256: b83f6e86d72981e43acd6534d7d992e0be49501755be1007bb78534367872534

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