Malicious PDF — malware analysis report

Static analysis result for SHA-256 17c44071f9538720…

MALICIOUS

PDF

82.5 KB Created: 2021-05-15 16:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c7ceaab0343874b58375decfc4f6f3b1 SHA-1: 18477f11725cdfd1de1445b751957e51c4db9deb SHA-256: 17c44071f9538720f4120b3152336bca8bdfd02e79a662d239833a06afe47373
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=are+fmx+transmissions+good PDF link annotation
    • http://bapewagidedexe.22web.org/adaptation_in_plants_class_4_worksheet.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/28214725060.pdfIn PDF document text
    • http://gelchlen.fun/motu_patlu_cartoon_movie_vs_mobivj5qm.pdfIn PDF document text
    • https://cdn.sqhk.co/vumojakizaw/8Yhegd1/flow_fit_sudoku.pdfIn PDF document text
    • http://salea.site/the_secret_law_of_attraction_movie_summary6cdyx.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/ggiHMGN/slow_fast_motion_video_editor_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/e83NlCz/nalagikod.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/yziikgg/lutejufe.pdfIn PDF document text
    • https://cdn.sqhk.co/dabebasavus/ibojeig/zefomusozamoz.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/tuzojazepabopaven.pdfIn PDF document text
    • http://bluebadgeapproval.com/39470004349658ed.pdfIn PDF document text
    • http://ziratonis.iblogger.org/40451070484.pdfIn PDF document text
    • http://kovajexikimodu.iblogger.org/16703962117.pdfIn PDF document text
    • https://cdn.sqhk.co/tujarazimok/gdhdiiV/.pdfIn PDF document text
    • http://legko.travel/suduxokolobijunalo3rpqt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rolefig.rf.gd/70097333541.pdfIn PDF document text
    • http://tupareboniviko.rf.gd/2020_census_questions.pdfIn PDF document text
    • http://bigisokuwes.epizy.com/autonomous_cars_technology.pdfIn PDF document text
    • http://mafekebokidodat.rf.gd/sawukafanalegigilazepoge.pdfIn PDF document text
    • http://bonizeza.epizy.com/nesepejos.pdfIn PDF document text
    • http://sinalowus.epizy.com/87651404986.pdfIn PDF document text
    • http://gijomifede.rf.gd/vozifeniduporad.pdfIn PDF document text
    • http://bavigivewekudu.rf.gd/47749311017.pdfIn PDF document text
    • http://vixabewe.rf.gd/73888984500.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 5040 bytes
SHA-256: 764b849af42ef24c6fbaed30a527913f62f055ce832a6cd649a1a45603122372
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 12636 bytes
SHA-256: e37960eec2f409087a9714d4a574ef3ab17a5d53bd6c468863928255f80e183f
font_02_sfnt_off00012e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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