Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d2adebb23f4c60…

MALICIOUS

PDF

78.0 KB Created: 2021-02-19 19:43:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2a7a78d6b5e71d87805ee115e9d9592b SHA-1: 3e2706e612f0bcd5d14f2856ad9a738d57310494 SHA-256: b6d2adebb23f4c60fc37d9809dbafe32b6b5a679d92d6904e3da5afcaf512aec
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to various PDF files on different domains, suggesting a coordinated effort to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/wb?keyword=nancy%20drew%20clue%20book%20guided%20reading%20level PDF link annotation
    • https://cdn.sqhk.co/degavorofala/tRIggdX/alone_quotes_positive.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/dicjfii/fairy_party_ideas_for_7_year_olds.pdfIn PDF document text
    • https://cdn.sqhk.co/gorisaburo/auijidu/39972848295.pdfIn PDF document text
    • http://pedufan.iblogger.org/28216556068.pdfIn PDF document text
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/vikamevemawomu.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/cohgdja/dejasepox.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/wL4Wvjb/rulanawiz.pdfIn PDF document text
    • http://totalcreditreport.info/luradaxanuroku8gpxt.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/ihiePjf/rally_championship_game_2000.pdfIn PDF document text
    • http://copyrightshelpscenters.com/5339263871555uq5.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/miwisup_kekoko.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/girhbih/mlg_nickname_generator.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/RCQLRDL/sagavefamusubovukojoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://belavujelu.epizy.com/10483203947.pdfIn PDF document text
    • http://vowukexakajan.rf.gd/54563055021.pdfIn PDF document text
    • http://vodukatova.epizy.com/84063143615.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_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 5356 bytes
SHA-256: 10a5d41ad67443481b64e03902e196f03690992f882ba43a6b002bd17b42c256
font_01_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 10592 bytes
SHA-256: 4947b26b1661fe3b636d4324c3d77d4b1cfd68597c126b86e478af2f175f437b

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