Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfd6a2eed6af49c…

MALICIOUS

PDF

78.2 KB Created: 2021-02-23 22:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 263090fd8cb1092bdffd61d529d19179 SHA-1: 7270c82d02204cc5a3dbf2afb36539c0268c3f24 SHA-256: fdfd6a2eed6af49ca944daecc099db54e039040bce60dc890a8ec882d93fc762
184 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, appears to contain text related to 'kvcc transcript request', suggesting a phishing lure. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=kvcc+transcript+request In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489041/normal_602044e309875.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/h9uXjip/cute_puppy_full_hd_wallpapers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_6018faa330fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369920/normal_601f0759ac205.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/fIozhcW/word_nut_level_864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe948666de38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_5fda878f26615.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369774/normal_5ff045f24ca18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_601fb8da206f5.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/g1GhaFN/vobalopivaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/iiBghsf/mogirakevasule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_6028052e4a694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492286/normal_5fe1a32b1a85d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_60268781bbc80.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/ibijih2/business_management_king_s_college_london.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zilamefuwata.rf.gd/how_to_tell_if_you_have_acne_or_pimples.pdfIn PDF document text
    • http://xukenefurirog.epizy.com/makoduno.pdfIn PDF document text
    • http://tuxizowivu.rf.gd/canadian_drinking_water_guidelines_tds.pdfIn PDF document text
    • http://zabirozoxut.epizy.com/27435836662.pdfIn PDF document text
    • http://nexofemexer.epizy.com/84558168159.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_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5048 bytes
SHA-256: 0984639dcf1a31a9671821acc374213980e24acac5712fd2260d2951f39383b0
font_01_sfnt_off0000fba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 15432 bytes
SHA-256: 2a5d973c2fa4397a745391c0e4663dd5edb06fff0b22c584831f36b9ab806268

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