Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfb351bb3a1e593…

MALICIOUS

PDF

78.6 KB Created: 2021-04-07 07:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 24698a8a92888b25d977d782d45c0a75 SHA-1: 73cc10af7bd767dde5c4487ee77988648e2dfdd8 SHA-256: ccfb351bb3a1e5935d97ee7439d92c3625a12ea204de5a546a30436f834d3f72
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure and a high ML classifier score further indicate malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' confirms its malicious nature, likely serving as a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+activate+euro+truck+simulator+2+without+product+key PDF link annotation
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/e19c01c4b33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_605a1e6672cdc.pdfIn PDF document text
    • http://xapozibun.22web.org/89686966459.pdfIn PDF document text
    • http://kavizubi.iblogger.org/accounting_and_finance.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/rinedugoxumumozaga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481271/normal_604f5e7417acf.pdfIn PDF document text
    • http://tokivaburag.22web.org/allahabad_bank_internet_banking_form.pdfIn PDF document text
    • https://lekozeva.weebly.com/uploads/1/3/5/9/135964777/vatefakowimekiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fd8f1b8da1df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekaniloba.rf.gd/rajasthan_handloom_bedsheets.pdfIn PDF document text
    • http://gexokaxaxitinug.rf.gd/5629431264.pdfIn PDF document text
    • http://kilubediboxut.rf.gd/bsc_physical_science_with_chemistry_syllabus_du.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_220145e227ef42458cdf539eb11e0e22.pdf?index=trueIn PDF document text
    • http://lavivavelamotad.rf.gd/92655425780.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_652d79e6e80d43e9abba9507b187c1a3.pdf?index=trueIn PDF document text
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_cafd088ccb004a6882f61ac60819e3e7.pdf?index=trueIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_1e6eff6b514a417c8aeedec93c760fa3.pdf?index=trueIn PDF document text
    • http://galebebabujaw.rf.gd/cercle_trigonomtrique_seconde.pdfIn PDF document text
    • http://joxumokuri.epizy.com/android_versus_iphone_market_share.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_7b12a7c8a047450ea1c8f153c6c0daf7.pdf?index=trueIn 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_off0000f046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 5724 bytes
SHA-256: 1eef29050ff4931960f12854af3d72a722ca2d3c3dd972d4513b61638bb59720
font_01_sfnt_off000103bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BB 11608 bytes
SHA-256: 5e3ff7bf744b6943d1b4c23d2ed0cb8616fb018b0f3f531fa1cce988cf5ffd4b