Malicious PDF — malware analysis report

Static analysis result for SHA-256 e129c5b94408c16e…

MALICIOUS

PDF

96.8 KB Created: 2021-04-28 22:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 919cd8cbd9ac9d554145bb1c74365ab6 SHA-1: de28c61096144ed1d4bbe42fddc51e7bfc16b5d8 SHA-256: e129c5b94408c16e3dcf08485a13c07f9f26c375e4ee8c8be15bfa851e73f091
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a potential phishing lure related to salary information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=mechanical+engineer+salary+australia+2020 PDF link annotation
    • http://logekolumo.22web.org/32374628738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476001/normal_5ffe614e3a511.pdfIn PDF document text
    • http://bevaxifiro.22web.org/adding_and_subtracting_algebraic_expressions_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fcd2566beaf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471240/normal_5fe0cb9017a82.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/6e05bc414b6481f.pdfIn PDF document text
    • https://wilibupa.weebly.com/uploads/1/3/2/6/132681560/b9f97ddfc286.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/english_catholic_prayer_book.pdfIn PDF document text
    • https://tuxipowu.weebly.com/uploads/1/3/4/6/134699968/bozixewodalirivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bivojeda.atwebpages.com/ms_powerpoint_practical_assignment.pdfIn PDF document text
    • http://zovoxasus.rf.gd/mapa_bruselas_gratis.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/aston_martin_v8_vantage_workshop_manual.pdfIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_9ccbbb8b9c694cbbab72761d066513d4.pdf?index=trueIn PDF document text
    • http://todezisalofabit.rf.gd/ledaxakateji.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/tafulot.pdfIn PDF document text
    • http://dogurof.epizy.com/lodeb.pdfIn PDF document text
    • http://belavujelu.epizy.com/chordana_play_app.pdfIn PDF document text
    • http://mibofive.epizy.com/zeleferedatekik.pdfIn PDF document text
    • https://8f1c0ae7-1ba6-4c51-a623-4d29f5e3aebb.filesusr.com/ugd/c1615c_e0695533cdd943ec85e4bd723f0e0e9a.pdf?index=trueIn PDF document text
    • http://temusifima.rf.gd/74017281675.pdfIn PDF document text
    • https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_6ad16ab3a4634914850ec95912de430a.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_fa8a1654ebeb468e902fb281f8330174.pdf?index=trueIn PDF document text
    • http://nedafab.rf.gd/lamurizolesego.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_off00013d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D31 5444 bytes
SHA-256: 677ed66d1cfb8de59cf659489b9510e45786e4904bd9137a75423aa8603d41c1
font_01_sfnt_off00014fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC0 11008 bytes
SHA-256: 473f951e90bbb60b65b673f8bdd330e3163b0b40e9ac56b12cf09fee2d51e58d

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