Malicious PDF — malware analysis report

Static analysis result for SHA-256 057a82ef3029d331…

MALICIOUS

PDF

71.6 KB Created: 2021-02-19 22:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ee0c864ed7aadd01d7ecaf965e11a94 SHA-1: da62adbd3f4c971271ae7f50ed5a8615848e8cb5 SHA-256: 057a82ef3029d3315cc29c5c7f4f8374397a807602737ff7d0e00a0a8b5d84a3
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The document body, though heavily obfuscated, suggests a theme related to financial instructions or changes, aligning with business email compromise tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://druttle.ru/strik?utm_term=how+to+use+fill+on+procreate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449009/normal_601f295254a5c.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/e460d7.pdfIn PDF document text
    • https://pozesipo.weebly.com/uploads/1/3/5/3/135346015/lelenujam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464541/normal_5fcf1aead5f2f.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/5065186.pdfIn PDF document text
    • https://radoxawema.weebly.com/uploads/1/3/0/7/130738714/wexotafeliniv_lujatu_kigixololuradad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403418/normal_5fc7fe92c2059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_5fea1e3a88b3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_601dfe38da394.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/hgSciaa/xeborofivoligerodadafemos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5ff56df03aa3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6013b53781992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_5fced0dfa81a7.pdfIn PDF document text
    • https://cdn.sqhk.co/defalevoruw/RhifigG/28108300001.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/ladiwuzetawedi/75286325878.pdfIn PDF document text
    • http://vufagozujidivu.epizy.com/33028972763.pdfIn PDF document text
    • http://riremeg.rf.gd/please_find_the_following_information_below.pdfIn PDF document text
    • http://temekem.epizy.com/9946651028.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/rifovawuri.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/assamese_new_video_song_free.pdfIn PDF document text
    • http://wawopuviginase.epizy.com/togamikowisuri.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/free_sample_certificate_of_appreciation.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_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 5064 bytes
SHA-256: f3ceae17a06f2a250d6ab876247ab71f6e6a7fea1bf3b1ed3fdb8c0de5b44f4f
font_01_sfnt_off0000edd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD9 10360 bytes
SHA-256: cfbd20e37659abdb6b6331e1a82f6add38f5643467533b2fc8f1b6300ad260a4

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