Malicious PDF — malware analysis report

Static analysis result for SHA-256 650271d499abeb24…

MALICIOUS

PDF

123.9 KB Created: 2021-03-20 05:51:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9042131ef3c57cabeed720e4ec65549c SHA-1: 80f47275a9109be521f11c9252a19be40a1bf81c SHA-256: 650271d499abeb2487de1dae96abd56d9ce61b9e9a243230d96f05e744d24bd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata related to 'arcee transformer movie' and the authoring application, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/123?utm_term=arcee+transformer+movie
    • http://phtech.site/when_do_graco_boosters_expireugptt.pdf
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/9345089.pdf
    • http://sweetmeet.online/how_to_connect_resound_hearing_aids_to_smart_tvf014x.pdf
    • http://study-english-04.space/zuxegexugimupe79tvi.pdf
    • http://kukushpa.fun/71792416917jd832.pdf
    • http://kyrgyztours.com/cursive_first_worksheets889rs.pdf
    • https://cdn.sqhk.co/vaxarogajib/YifSJ4s/11333717880.pdf
    • https://fadapezak.weebly.com/uploads/1/3/0/7/130775088/1325985.pdf
    • http://bratskpravojur.ru/yo_amo_a_paquita_gallego_capitulo_29843mj.pdf
    • http://musofiron.ru/aprender_lettering_onlineii4fs.pdf
    • http://islemleriniz.org/24538607910q4d4y.pdf
    • https://vugiwaxe.weebly.com/uploads/1/3/4/7/134739196/zolitevape-nofofota-vikirex.pdf
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/2292535.pdf
    • http://sayfelengs.space/how_to_reset_a_rheem_water_heaterdam4j.pdf
    • https://cdn.sqhk.co/wolonevavaru/ivjeia9/dobewafijoxiravolilerop.pdf
    • http://copyright-supporthelp.com/volume_price_analysis_tradingfbsno.pdf
    • https://cdn.sqhk.co/sukexesi/jhlicgc/50187172950.pdf
    • https://zatuzura.weebly.com/uploads/1/3/1/4/131453499/7621a.pdf
    • https://zelelifejoba.weebly.com/uploads/1/3/4/3/134321633/zujebaronajufejuteb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off00019dff.bin
3497adc606985275e013471047935adec15ac873a17399a32f19e906cb34385f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DFF 4832 bytes
font_01_sfnt_off0001ae3f.bin
3a153601e58ca6dd99c5a54dcd3a07f1afd2ad39c2e6b28fad8838a40b019516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE3F 11124 bytes
font_02_sfnt_off0001d3f8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3F8 4324 bytes

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