Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49848309dc00f77…

MALICIOUS

PDF

88.0 KB Created: 2021-05-16 14:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3581a303ce18d590afdc2fe7500c37b3 SHA-1: 70eef316636d083ee15d3f161ed91a266edcdd10 SHA-256: a49848309dc00f77f36d00ce62bd2c402505ac22bfa7373d4d5f34a17646a549
134 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. It uses an urgency-based lure. 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 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://golowaki.ru/strik?utm_term=what+does+it+mean+when+your+car+says+service+airbag+system PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384851/normal_605d8df32be35.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/58691563534.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/hbPjjhh/black_friday_2020_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/govupasuti/ihfbmhc/apheresis_guidelines_2013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5fd2700c61cab.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/ghjcjfJ/21525462180.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5ff862af427ec.pdfIn PDF document text
    • https://cdn.sqhk.co/zijopenuxafi/gAGzwBb/skyscraper_meaning_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471706/normal_5fdf2c2fa3b09.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/ielts_academic_answer_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_603a142443ee6.pdfIn PDF document text
    • http://nunegotopexipo.iblogger.org/7221944875.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_acdd09170aaf48ff96b1c03156e22c42.pdf?index=trueIn PDF document text
    • http://supuwevul.atwebpages.com/38655119013.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/asc_timetables_2019.pdfIn PDF document text
    • http://dojopugoput.epizy.com/27699729454.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/wesalesovefade.pdfIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_6c0f30afd953452980b550bc6aa74149.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazutun/37609866816.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/75929351947.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/winoponotafarozaxagu.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_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 5728 bytes
SHA-256: 27b7c100b9b19fad3d05ca67703d7d72916bdde2873d927d9327fd1076dbe07f
font_01_sfnt_off00012bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BAD 11372 bytes
SHA-256: 3cd9c84d851fbdacda58e1b6df2c8e8980f3b077cc5167c49b33c19d6a9d1816

Open this report in the interactive analyzer, or submit your own file for analysis.