Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c89863293ae9be…

MALICIOUS

PDF

80.6 KB Created: 2021-04-19 09:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 832c5cc59ecf62658c56a277223c0207 SHA-1: 740cfb0cf0942a840e0ea7ed77ecc198e28c7363 SHA-256: 46c89863293ae9bef8b7cbccf7d42ad9aedda369c777f7ceefbf2dd786f61b55
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic analysis identified the document as a link farm with numerous embedded URLs pointing to disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the nature of the embedded links and the overall detection strongly suggest an intent to redirect users to malicious content.

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 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://vilenefex.ru/strik?utm_term=diary+of+a+wimpy+kid+dog+days+short+summary PDF link annotation
    • https://cdn.sqhk.co/xemugugafot/fBGnapQ/play_4_numbers_ct_night.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/aRGTtnw/12787638528.pdfIn PDF document text
    • https://cdn.sqhk.co/riroxale/Kcthdje/34141283717.pdfIn PDF document text
    • http://zoosalon.org/black_skin_white_masks_filmm4dgi.pdfIn PDF document text
    • https://cdn.sqhk.co/vinikawikuve/TggInmo/cat_warmer_for_outside.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/gwhichd/retroarch_n64_roms.pdfIn PDF document text
    • http://bigtittybella.com/phishing_attack_apkwn7al.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/Njf7YtP/video_live_wallpaper_download_for_pc.pdfIn PDF document text
    • http://idealica-itufficiale.website/watch_nfl_live_online_free9rlxo.pdfIn PDF document text
    • http://vorecan.fun/82448945410tilox.pdfIn PDF document text
    • http://boost-shop.xyz/49509407595yjkax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujilexulajuwup.atwebpages.com/how_to_breathe_during_gym.pdfIn PDF document text
    • http://poborunedajemo.onlinewebshop.net/72510703957.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/bitcoin_trading_strategies_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/pibutekilenax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a91f55-b172-48b1-ba1f-b66b3f87fa39/71549769572.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/happy_new_year_song_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/85725277500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268abef9-df56-4417-8600-8993713b4fef/funepofelojebuxowuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9529480-b136-421c-a6ef-dce440384607/what_is_meant_by_the_term_selective_perception.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/wixovexikobawudukapam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c466ed-1c6d-434e-909a-8c35289b6f69/99904514642.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_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 5680 bytes
SHA-256: 9bfd21ee235e814e5cc63cd921d9e500e6d817f192b2f2d552241b8dbe461bf2
font_01_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 11600 bytes
SHA-256: 39fdd12e391a9dc2a074da3ba088ccd96b63f5ee5fa9078c6834d86a65b6ae76

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