Malicious PDF — malware analysis report

Static analysis result for SHA-256 883209b0e8109152…

MALICIOUS

PDF

72.3 KB Created: 2021-02-10 02:21:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 12760a9bb0961a449e4211ad3e32988b SHA-1: d58fa346397c07b6072107c1bfac9f9721f47147 SHA-256: 883209b0e81091521007496d70cb5c8431fc9d08575cabb70bfead9986a1826e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/aws?utm_term=before+i+wake+movie+subtitles PDF link annotation
    • https://cdn.sqhk.co/zezaxemepe/PIlhfjc/classic_labyrinth_3d_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/buuT1hb/bad_piggies_pc_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_6018daf814e58.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/FF3gew5/anthill_farms_abbey-_harris_pinot_noir_2017.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/remuf.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/dijujipados-kevofesebevupe-zuzosag.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/65d55016e5225a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460982/normal_6002bc3cebc32.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/bFhbdgi/fugidowuwebole.pdfIn PDF document text
    • https://kivobuduzuv.weebly.com/uploads/1/3/0/7/130739084/dukufotofuwedig-jiwifuxi.pdfIn PDF document text
    • https://vuworuvadile.weebly.com/uploads/1/3/1/6/131637376/filowi.pdfIn PDF document text
    • https://cdn.sqhk.co/zugeketinog/dhg44k0/fusezanodis.pdfIn PDF document text
    • https://navijaxilof.weebly.com/uploads/1/3/2/6/132696044/2782968.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/KNiaNhd/93576497013.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/vujefa.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/aihvibi/95380106730.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/dLDgcFB/church_at_the_crossing_aledo_texas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/picture_logo_quiz_answers_level_15.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/rixezubegaselupelax.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/marketing_mix_free.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/beiimaan_love_movie_full.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_off0000dae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE6 5320 bytes
SHA-256: ee82877c454d2ef5f9d8e8bb066db79c102395026f42decc7d29c4af2f85f618
font_01_sfnt_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 11740 bytes
SHA-256: f75a1b5d809d87860d38c9dd24aebcef7cad72092be18881caa9983491c0788c

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