Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48b7dcbf2750e52…

MALICIOUS

PDF

75.5 KB Created: 2021-02-27 14:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c90b7fb038afdf8bdd2d4dc70bc68581 SHA-1: d9da977630e0663dfbe07eb28415d5a0374520b7 SHA-256: e48b7dcbf2750e5207d59b0921833abe9d854cd642a1fa659f088166cca500be
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on potentially untrusted hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=loader+droid+apk+unlocked PDF link annotation
    • http://boviriso.22web.org/44296859269.pdfIn PDF document text
    • https://cdn.sqhk.co/lukuvekeliki/C5ifXja/dipijife.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/d8jbrge/84376178611.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxigu/hdghhjD/30827753784.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/ghdkV33/91743775981.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/djacsgg/domesedubeveletubabola.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/ifFxhdB/livowigilel.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/arris_surfboard_sb6183_manual.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/30321462429.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/dupebutedepi.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/W5FdvBM/fifa_world_cup_qatar_2022_groups.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/lakekuteluf.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/fhdHCzg/14110636632.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/hhgjfAA/elder_scrolls_blades_nintendo_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/0Q4ZhYN/97440387739.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/Hghmhh7/75191206167.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/jh1yijz/download_game_sweet_princess_hair_salon.pdfIn PDF document text
    • https://cdn.sqhk.co/vojofarakiva/B8hhafU/mepidiw.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/hGjhhgq/tidutuweropew.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/icgeHih/tonibokudumum.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/cgdigjb/14817076485.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwixatokido.epizy.com/80156047685.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/dresden_files_ghost_story_audiobook_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 4892 bytes
SHA-256: 6c07070ada5af3f528e828e6d1ae0107942d0f799a8693cb4134d6b0b38fedd6
font_01_sfnt_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 10884 bytes
SHA-256: 047593995bf75bc5a437727b16ae66a24ffc9ce1a82d27e8f8ec56260d52bd45

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