Malicious PDF — malware analysis report

Static analysis result for SHA-256 422551f737391786…

MALICIOUS

PDF

72.1 KB Created: 2021-02-12 10:08:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3c9342d4b3210132f7fc8bd5a832b9d6 SHA-1: 8cd3f14f31e3bba5fdefb0ab097d401fcebbed95 SHA-256: 422551f73739178651bdcfcbb9c7fc618b74d7ae799d57ce85b904172b4e0290
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=al+ibaanah+e+books PDF link annotation
    • https://cdn.sqhk.co/fovipobex/bgehahj/velukijizafoximolatado.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/libiapn/86286649761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370264/normal_5ffd44c78fdd2.pdfIn PDF document text
    • http://winoorama.website/sheetz_grocery_loyalty_card360ua.pdfIn PDF document text
    • http://nakanilo.club/397043084633ua3v.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/9hf20id/revowajabijozazuvubipu.pdfIn PDF document text
    • http://storedubai.shop/matekodod79xpx.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/chgheib/baked_chicken_asparagus_goat_cheese.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hlWCnhi/puzafoxovixowutakez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60226d6333fc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_60148675f114f.pdfIn PDF document text
    • https://cdn.sqhk.co/xiditado/jjcsgie/marshmello_top_20_songs_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/jibbYif/10861219223.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/llYgije/49511976439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408992/normal_5feb9efb55992.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/jhjfQ4X/87953278812.pdfIn PDF document text
    • http://mavpa.fun/2597592616gysgr.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/naxizugenabi/software_as_built_documentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/calendario_hebreo_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/44035235372.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/commodore_amiga_cd32_games.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_off0000de17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 4872 bytes
SHA-256: 80a5d3898554fea9327ee16292deabe6f3f4600d317670b19378ab6746cd2dcc
font_01_sfnt_off0000eea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA1 11272 bytes
SHA-256: 489a15267730cdff3612e701397c55615196f936e4b0a47df162dc530a954c90

Open this report in the interactive analyzer, or submit your own file for analysis.