Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da0dd47e8ce646e…

MALICIOUS

PDF

73.1 KB Created: 2021-01-27 08:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5aea371368742f4c56fa6ff5a8baa4ec SHA-1: 8a61d2a8a6dca41bb6b2f6ed4b2ddc725b866c0f SHA-256: 4da0dd47e8ce646e53de422ba40cde3d789b45ae8a6cc3d697cb2b7baebfa595
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to link farms on disposable hosting, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, appears to be related to search terms, further supporting the lure of a phishing attack.

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://traffset.ru/wb?keyword=marchbanks%20assisted%20living%20anderson%20south%20carolina PDF link annotation
    • http://hugertely.xyz/125419725940odyq.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/filiniramola.pdfIn PDF document text
    • https://tekebuzegox.weebly.com/uploads/1/3/0/8/130814382/ripimosifan-padimirubogevab-votiriv.pdfIn PDF document text
    • https://datugabow.weebly.com/uploads/1/3/4/7/134745554/5fc0ca857d1256.pdfIn PDF document text
    • http://tranquils.space/grow_idle_archer_mod_unlimited_moneyl26x7.pdfIn PDF document text
    • http://remont-kholodilnikov.website/cute_ninja_girl_adventure_free_games1av0j.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/motuwib.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/xemunuda2osry.pdfIn PDF document text
    • http://hangookoil.ru/origami_instructions_for_fun_apkw93mo.pdfIn PDF document text
    • https://bevabuje.weebly.com/uploads/1/3/4/8/134897483/motazebafozexe.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/download_kakaostory_apk_for_pc075q9.pdfIn PDF document text
    • http://eurofamily.pro/nolafovetolqnybm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vitupofelomar.epizy.com/77991995419.pdfIn PDF document text
    • http://dojopugoput.epizy.com/gexodab.pdfIn PDF document text
    • http://fumibomi.epizy.com/best_truck_sim_game_for_android.pdfIn PDF document text
    • http://fimogaselan.rf.gd/pezapepawifowetokop.pdfIn PDF document text
    • http://zitejilid.epizy.com/short_guided_meditation_script_for_relaxation.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_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 5468 bytes
SHA-256: 006bb1e742f8d7c4ee48333346257948dc6b2dc1e71ccf632c325c4352c3ddc5
font_01_sfnt_off0000f1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E8 11048 bytes
SHA-256: af22437ab5089de10f9a89490a8188ff44588f27199ae2a84d22f77b8fd91d50

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