Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4baa42f8ff1e80…

MALICIOUS

PDF

68.4 KB Created: 2021-06-12 08:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cf68d9c3cfaa815607a8cf2222dd3dd9 SHA-1: ee43d4fbca62d23e7d6abe1e004ed2d46ec1e5f1 SHA-256: 7e4baa42f8ff1e809e6f71cf8b556b0c71b942c1ae0909a22fba6bfafde3469c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://inwebjor.ru/pbw?utm_term=cop+tv+shows+from+the+90s PDF link annotation
    • https://jabevemejo.weebly.com/uploads/1/3/1/4/131483275/kevebetuwu.pdfIn PDF document text
    • https://badivilaw.weebly.com/uploads/1/3/4/8/134848312/1246569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494166/normal_5febdf53208d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_604e2be9050dc.pdfIn PDF document text
    • https://zosomezo.weebly.com/uploads/1/3/0/9/130969149/dapewirobeloja-xitew-mukukiwinawitog.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/4fb31664daa19.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/66d7a21980a81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6064102f3689f.pdfIn PDF document text
    • https://tetavezodumop.weebly.com/uploads/1/3/4/6/134645623/pixurusutuzoro.pdfIn PDF document text
    • https://desijikero.weebly.com/uploads/1/3/5/9/135964668/fudonulujojatafesuwu.pdfIn PDF document text
    • https://biwizifu.weebly.com/uploads/1/3/4/5/134505058/pewunewetil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://guvevef.pbworks.com/f/xafuj.pdfIn PDF document text
    • http://resewoxe.pbworks.com/f/bazadavepiwobaxomivaximi.pdfIn PDF document text
    • http://gedelageke.pbworks.com/f/1st_class_drawing_book.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144440397/jlab_sport_wireless_earbuds_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ffd262-e80b-4e64-a6f3-fbf426c82d4d/16925308168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93cf0a8f-1fba-43d1-b439-db6b44f41004/formato_para_auditoria_5s.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/wilowakasadur.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/vejitisaketesorilewezuvi.pdfIn PDF document text
    • http://tefimemovem.pbworks.com/w/file/fetch/144913428/twilight_saga_full_movie_download.pdfIn PDF document text
    • http://kemususi.pbworks.com/w/file/fetch/144752328/angry_birds_unblocked_google_sites.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/w/file/fetch/144587376/nimosarabukuvas.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_off0000d0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E4 5252 bytes
SHA-256: 5a961ed6d5078775575d8fa353b5868bb12dbc5433801f26e3e30be772ffe8ac
font_01_sfnt_off0000e2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AE 9892 bytes
SHA-256: 59ea2302d519a9d2ebe54843eb18106fdda8e475d8b798d23c26c4d3a00ea805

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