Malicious PDF — malware analysis report

Static analysis result for SHA-256 449c49ec77a9c39a…

MALICIOUS

PDF

135.7 KB Created: 2021-04-04 14:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa32845d6f115337c1d44656312cc278 SHA-1: c6de84a556b1c039e3dec599704cfe9ef168500a SHA-256: 449c49ec77a9c39ad9755690b6e6f1c7a89a9f2fbf71334ac5e1105c694f87e5
134 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. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The presence of multiple external URIs, including those on potentially disposable hosting, supports this. No scripts were extracted, but the overall structure points to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=zelda+a+link+to+the+past+items+locations
    • http://idealicait.website/hd_movie_site_listf38cm.pdf
    • https://cdn.sqhk.co/pevejotomoma/O9jeDjj/tawetibojoxojilu.pdf
    • https://cdn-cms.f-static.net/uploads/4474719/normal_6009fef347ae2.pdf
    • http://chtotakoevuxom.biz/xfinity_remote_codes_for_samsung_soundbarszyn4.pdf
    • http://lishop.site/phoenix_lol_sheet_musicrzcpv.pdf
    • https://cdn-cms.f-static.net/uploads/4413719/normal_6039b6b67a3f6.pdf
    • https://cdn-cms.f-static.net/uploads/4371508/normal_60636b0967888.pdf
    • http://kukushka.space/catherine_zeta_jones_griselda_blanco_netflixqjf4m.pdf
    • http://tamakar.xyz/15300072545y2acq.pdf
    • http://matrixbicycles.com/website_er_free_full_version_online0spgm.pdf
    • https://static.s123-cdn-static.com/uploads/4488580/normal_5ff1523e8035b.pdf
    • https://cdn-cms.f-static.net/uploads/4380384/normal_600de7dc5dc7d.pdf
    • https://cdn.sqhk.co/zidodovare/fhiihkg/nonoj.pdf
    • https://cdn.sqhk.co/vanewano/ShjIgg0/slice_dice_pizza.pdf
    • https://cdn.sqhk.co/koxajavu/ejeiaGW/26749889514.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14579757-8399-40ae-9aa0-1c510f02119b.filesusr.com/ugd/5613ee_5c193f0107d746cab524692ef7cdcdde.pdf?index=true
    • https://s3.amazonaws.com/kagedatabujo/best_fingerstyle_guitarists_in_the_world_part_1.pdf
    • https://s3.amazonaws.com/fajonubinomeder/85939359880.pdf
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_360d5afcfc324a41a4143be27937ed01.pdf?index=true
    • https://s3.amazonaws.com/rujabepifar/kitchenaid_cooktop_replacement_parts.pdf
    • https://s3.amazonaws.com/dalava/21716126612.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018675.bin
596bdca747eb88f45098fa9c5a3742be00870bfede4cbf4d59d97a7ba1a14b26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18675 24608 bytes
font_01_sfnt_off0001d47f.bin
7c2ff2487f43c0976155c1987bfd8cb500ca626f073466eaa49aa42f16e13e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D47F 5236 bytes
font_02_sfnt_off0001e62b.bin
9cae932bb3b020f7795afcbc8f023d3f7927fc895a1037875411198fce1d8765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E62B 12516 bytes

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