Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ebb944be548a9c…

MALICIOUS

PDF

74.1 KB Created: 2021-03-21 02:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 75255c842d64054a231ec2b9a6c31963 SHA-1: d7b3e1c6a67c1edfe5f4e5678d376a11f83ec870 SHA-256: a6ebb944be548a9c7df10a7f6f2ae62dd235c39877f16b7a82f7c9ca52c6602f
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, many pointing to disposable hosting or redirectors, suggesting a link farm or phishing campaign. The presence of these links, combined with the ClamAV detection of 'Pdf.Phishing.Trojan', strongly suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=hitachi+nr90gc2+review In PDF document text
    • http://pajuwepubawip.sportsontheweb.net/76723663116.pdfIn PDF document text
    • https://siwevobone.weebly.com/uploads/1/3/5/3/135317475/5376740.pdfIn PDF document text
    • https://cdn.sqhk.co/gotoruzud/jca3M9T/39420498597.pdfIn PDF document text
    • http://sukaxebodaruju.iblogger.org/you_re_the_reason_piano_sheet.pdfIn PDF document text
    • https://fizabogozof.weebly.com/uploads/1/3/2/8/132815807/9053602.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/6835101.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/7953848565.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/where_do_chicks_come_from_book.pdfIn PDF document text
    • https://cdn.sqhk.co/kagixepo/4o5jidg/amsterdam_smart_citizens_lab.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/ieyhf52/clasp_knife_phenomenon.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/dbPPjcV/campground_with_water_park_louisiana.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/damajasazazesonipunoparu.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/5a058.pdfIn PDF document text
    • https://cdn.sqhk.co/kiranagel/gfidJxu/wojerigepidezonora.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/vCHFibG/luvikadok.pdfIn PDF document text
    • http://zusozovi.22web.org/metformin_hcl_er_and_alcohol.pdfIn PDF document text
    • http://zuraleres.mywebcommunity.org/16365499706.pdfIn PDF document text
    • http://saniwigudovo.scienceontheweb.net/mujoritudaf.pdfIn PDF document text
    • https://cdn.sqhk.co/piredonina/jYidThd/74487731450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivuwasiwitovud.rf.gd/46141361828.pdfIn PDF document text
    • http://famomijis.onlinewebshop.net/bapebawamapo.pdfIn PDF document text
    • http://zapusov.atwebpages.com/kowofunitixepowenofi.pdfIn PDF document text
    • http://fadowudi.rf.gd/does_netflix_have_the_magicians.pdfIn PDF document text
    • http://vububogux.epizy.com/musewagebetim.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_off0000e193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE193 5396 bytes
SHA-256: 8a1591e61068b0362713534ae1d90e048a13848b7bdec31ac0b16c7792eb1408
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 11560 bytes
SHA-256: 82463a9550862b2d51bb322b1c61ce489cbc33d95ab0b6666ea3d351f5662447

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