Malicious PDF — malware analysis report

Static analysis result for SHA-256 014f4c3a19d30c43…

MALICIOUS

PDF

85.3 KB Created: 2021-05-14 17:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 135a82a278dfdd1b346f257fa20e3c58 SHA-1: c3ae6085bea344ba791e3fb308be2c52489d9baa SHA-256: 014f4c3a19d30c431cf415daa512fffe7555876e189aacbf64e822f97f26dbbb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, many of which are part of a link farm designed to redirect users. The primary lure appears to be a guide on creating an AWS account, which is likely a pretext to drive traffic to malicious sites. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing and trojan activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=how+to+create+amazon+web+services+account PDF link annotation
    • http://bowuvudofi.scienceontheweb.net/94884969966.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/color_palette_codes.pdfIn PDF document text
    • http://show-visitor.xyz/fotomokojolo8cv.pdfIn PDF document text
    • http://bowoporoj.iblogger.org/rent_agreement_format_in_english_maharashtra.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/principles_ray_dalio_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6068b406693f8.pdfIn PDF document text
    • http://zomesotemaxage.66ghz.com/susux.pdfIn PDF document text
    • http://devgame.design/koxametotf6g80.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/embroidery_patterns_free.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/78454748200.pdfIn PDF document text
    • http://goodnaturak.space/32953817416ilayp.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/kupupixuvom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_603fb5bd8a8b8.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/dart_language_tutorial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377410/normal_6035b765e23fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418171/normal_5feb7678413ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482405/normal_5fdb275d89dc7.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/schaum_outline_series_signals_and_systems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_16bca0ef53d3405aa6fe32b3f512e0ad.pdf?index=trueIn PDF document text
    • https://04934832-22f3-474e-96de-b9d593e92251.filesusr.com/ugd/f390e7_53733ede931b46fc812db37dcbfcf0a5.pdf?index=trueIn PDF document text
    • http://magotabitujotu.rf.gd/60693227863.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/31010409365.pdfIn PDF document text
    • http://letufikafiv.epizy.com/15443746200.pdfIn PDF document text
    • http://wobanunep.myartsonline.com/fonimut.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/39140534046.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_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 5216 bytes
SHA-256: 032e1f89f5e2db94f0d9351b5e1397d3815298feba7ae8f294591293db5b5133
font_01_sfnt_off00011e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6C 11544 bytes
SHA-256: 8680830dc6601d147b5b7b0b388ac07947e349bf44e5a3a256c543551269f2c3

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