Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b94d18b508d868…

MALICIOUS

PDF

69.9 KB Created: 2021-05-12 15:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1097d2f14fab9252ad772315d6e11a27 SHA-1: 75dc65404697298adc8d23ade86839d1e0b8e23e SHA-256: 70b94d18b508d868c21fbb04a8d1df97da68ec503b692dfe75b6a15a2c7b581b
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://botokaw.ru/strik?utm_term=hypertherm+powermax+85+service+manual
    • http://vizuwubifazezix.22web.org/ionic_bonds_worksheet.pdf
    • http://weinmvc.net/how_to_stop_buying_clothes_you_never_wearo1vra.pdf
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5fdfa6de3d2ab.pdf
    • https://cdn-cms.f-static.net/uploads/4391903/normal_60268e2ea1c82.pdf
    • https://cdn.sqhk.co/kifukuvitog/ihGvQ9O/lajexanaxexa.pdf
    • http://greatmasters.biz/riroxafamofan94f.pdf
    • http://investmag.org/dell_optiplex_960_memory_specsbb5jo.pdf
    • http://afracheat3.xyz/20647697092atgfj.pdf
    • http://boviriso.22web.org/7008142775.pdf
    • http://nasty666.space/308512221322iare.pdf
    • http://ruvagusowi.22web.org/bhaiya_ji_movie_song.pdf
    • http://masajsalonunuz.com/971282515876qv86.pdf
    • https://cdn.sqhk.co/janawezexoj/nhhggjb/born_to_die_lyrics_leftover_crack.pdf
    • http://yewes.fun/domain_and_workgroup86qko.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kasupitebuse.rf.gd/prince2_agile_foundation_book.pdf
    • http://ganusigesu.rf.gd/monster_in_law_full_movie_free_123movies.pdf
    • http://tonerud.epizy.com/69609213830.pdf
    • http://rewerikipij.rf.gd/xizarenevi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef2.bin
08daa905e6052403d8e2568839a4e511c01c4ec0f4e0a2bc2bdec585bb21a2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 5776 bytes
font_01_sfnt_off0000e293.bin
bec0c85daf0a18732ee6a261614334e8679a5a6b0949d39e5bbe7c77a32347f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 11244 bytes

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