Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2742f101705e894…

MALICIOUS

PDF

76.7 KB Created: 2021-03-29 01:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b229e9af7510f825ca03a1124e841e81 SHA-1: 7b953f0b32a90078ce1a669ada119b9a40ac5177 SHA-256: e2742f101705e894e7db172e2b1cc6365f917c95dd8245a924c6086b4f916344
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The presence of external URIs and a link farm heuristic points towards an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=how+to+fix+whirlpool+ice+maker+youtube
    • https://cdn.sqhk.co/pekotegafod/hrfhiib/43130616865.pdf
    • https://liwitozawaben.weebly.com/uploads/1/3/4/0/134042828/463488.pdf
    • https://cdn.sqhk.co/goganededem/jdijgfF/zakesokapojojepeketi.pdf
    • https://sitimewodojex.weebly.com/uploads/1/3/1/8/131856527/aa15f.pdf
    • https://gimipozadifan.weebly.com/uploads/1/3/1/3/131380487/lezutokitosizaj-kerokurokeve-fukovedesuj.pdf
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/faremojoparuk.pdf
    • https://cdn-cms.f-static.net/uploads/4374708/normal_6039d136e68ec.pdf
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/d00f8d7015.pdf
    • https://cdn-cms.f-static.net/uploads/4381756/normal_602282e984caa.pdf
    • https://dubilovatigalis.weebly.com/uploads/1/3/4/7/134701517/7401692.pdf
    • https://cdn.sqhk.co/noperizapewo/cLx703q/greatest_songs_of_the_50s_and_60s.pdf
    • https://timonuwek.weebly.com/uploads/1/3/4/3/134383578/d160de972d64a9.pdf
    • https://cdn-cms.f-static.net/uploads/4471256/normal_60507adfc336d.pdf
    • https://cdn.sqhk.co/zenegiwowi/gh1Jhig/funixodad.pdf
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd80f1fa45ac.pdf
    • https://cdn.sqhk.co/vigasigetogi/djbjRiu/accuradio_smooth_jazz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tonisefoteka/92441674780.pdf
    • https://uploads.strikinglycdn.com/files/a9c67c7f-e40a-4c0e-9d0b-1ac9ea92965b/fevudizusikijoli.pdf
    • https://uploads.strikinglycdn.com/files/f9fa8166-b065-4d7e-b64a-0cfd56c855b1/fancy_way_to_say_patriotism.pdf
    • https://s3.amazonaws.com/kudowo/how_to_change_a_square_d_pressure_switch.pdf
    • https://s3.amazonaws.com/nuruvapozixix/dudunimet.pdf
    • https://s3.amazonaws.com/rolefosiju/1x_chain_guide_review.pdf
    • https://s3.amazonaws.com/zinudipir/juled.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_off0000eef0.bin
8e727484df3f0019b9af900b8336bc897a8c503b7aacad3a0c24462f47e2c459		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 5504 bytes
font_01_sfnt_off00010197.bin
73b094ccc9d7ce6a738c1f82e02a105c678f6272106ef63da03e46d246990156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 10344 bytes

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