Malicious PDF — malware analysis report

Static analysis result for SHA-256 378a100ca84843d1…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 20:42:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3854d50450927d24bdff731595626989 SHA-1: 3c292bb4e69107510280e54d62b864832b41ec42 SHA-256: 378a100ca84843d14d361481bbcbef249ff06d7155b7ced5847f8b1eba8730f1
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/award?keyword=salvation+army+christmas+assistance+richmond+va PDF link annotation
    • http://nugekurobeju.iblogger.org/ruzabebazokixoliwulubix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6024aa1a1a9af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459057/normal_5ff3ff90033e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fcb63737e645.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5fc657257f036.pdfIn PDF document text
    • https://fevenegor.weebly.com/uploads/1/3/1/3/131380973/9568378.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/ruzumeb/gupalizobadosovapa.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/faith_hope_love_tattoo_template.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/69513016687.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/summersville_lake_climbing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/common_core_math_algebra_1_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/pdf_acoplar_capas.pdfIn PDF document text
    • http://zevofelajasuz.epizy.com/16607026677.pdfIn PDF document text
    • http://roxonolabixatox.epizy.com/xegijaf.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/42216637174.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_off0000e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 5444 bytes
SHA-256: e8bec95956c4c430bddf95dc912947885ea12ce4f8e598ace203c77da733398c
font_01_sfnt_off0000f2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A8 9848 bytes
SHA-256: 43aaca1d83c8fda93c150c58be7ed01a4ade1527cc2e441d30174fea06a80e55

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