Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cbed54a0b1143b0…

MALICIOUS

PDF

81.1 KB Created: 2021-03-25 01:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ad62f610c57bb47b3d53a352a590b6 SHA-1: dd486acee62f6bbe97df77e586c3dd566d5ab873 SHA-256: 6cbed54a0b1143b00b628d37fb335c11e9039f66c7834e64cad901618c3f076a
156 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a potential phishing or malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=night+circus+audiobook+free
    • https://ruvawuwejijexut.weebly.com/uploads/1/3/0/8/130814193/supikojozewuzej.pdf
    • https://xegafifa.weebly.com/uploads/1/3/0/7/130776616/c6fd0a345d.pdf
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5fd6a98a66e3d.pdf
    • http://gipoletuzemixol.iblogger.org/26263656010.pdf
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/8a159d.pdf
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/lejipa.pdf
    • https://perikoweb.weebly.com/uploads/1/3/5/2/135297066/7906442.pdf
    • https://cdn-cms.f-static.net/uploads/4472185/normal_6016fcae50a4a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/makumapikeze/corporate_social_responsibility_companies_act_2013_ppt.pdf
    • https://s3.amazonaws.com/lomogas/bsa_scout_law_and_oath.pdf
    • https://s3.amazonaws.com/fogibi/72773132218.pdf
    • https://s3.amazonaws.com/resabomibogodaw/37324158385.pdf
    • http://winuzuvejifod.epizy.com/mixawixumupuxodoge.pdf
    • https://s3.amazonaws.com/sitozi/catfish_fishing_guide_near_me.pdf
    • https://s3.amazonaws.com/gowebabuxogiro/71112866803.pdf
    • https://s3.amazonaws.com/rodiligarexo/jufados.pdf
    • https://s3.amazonaws.com/lovomijelun/37191291979.pdf
    • https://s3.amazonaws.com/kozewuposoridil/tubepusar.pdf
    • https://s3.amazonaws.com/dupula/skyrim_se_best_weapon_mods_2020.pdf
    • https://s3.amazonaws.com/xasovewipeje/responsive_adaptive_web_design.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f203.bin
27c6db802e948cee1a90cbda0498ba71956941b33959cfd3f097d76177fe6e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 5200 bytes
font_01_sfnt_off000103d3.bin
3e002722447323d719e7d6243591304ce6302aff20d05ba857a1c5a09e7d932e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103D3 10492 bytes
font_02_sfnt_off00012784.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12784 4324 bytes

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