Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f0e2bb259617ea…

MALICIOUS

PDF

99.3 KB Created: 2021-01-13 01:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0b01a68eb912393541b2bae1f11b0208 SHA-1: 377038150509615281696e2a5d91f044d456b045 SHA-256: 97f0e2bb259617ea6ab6cbf37a4793a61848dabc5b6fb4677d01e69e20937de7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://trafficel.ru/aws?utm_term=welcome+email+template+html+free PDF link annotation
    • https://site-1168348.mozfiles.com/files/1168348/pamurovibedadumajiluvujox.pdfIn PDF document text
    • https://site-1176340.mozfiles.com/files/1176340/motorola_razr_5g_verizon.pdfIn PDF document text
    • https://site-1168289.mozfiles.com/files/1168289/snows_bbq_tootsie_location.pdfIn PDF document text
    • https://site-1176882.mozfiles.com/files/1176882/57880710093.pdfIn PDF document text
    • https://site-1203055.mozfiles.com/files/1203055/96742414062.pdfIn PDF document text
    • https://rajufunes.weebly.com/uploads/1/3/4/7/134760411/6290288.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_5fd3d652656d8.pdfIn PDF document text
    • https://site-1168081.mozfiles.com/files/1168081/muxikubabovukoxaguvamitov.pdfIn PDF document text
    • https://site-1197494.mozfiles.com/files/1197494/pro_series_drag_racing_twin_turbo_mustang_tune.pdfIn PDF document text
    • https://nirulutot.weebly.com/uploads/1/3/4/7/134700174/b21510264e3362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469630/normal_5fedd63244019.pdfIn PDF document text
    • https://site-1180330.mozfiles.com/files/1180330/stunt_truck_jumping.pdfIn PDF document text
    • https://site-1177407.mozfiles.com/files/1177407/premier_league_golden_boot_2020_odds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF3 4772 bytes
SHA-256: 34c26aa8e69883231be6fcb92a89b806a60205e86e83e50f893b839961626493
font_01_sfnt_off00014d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2F 10872 bytes
SHA-256: dc329b4af1c6fcfe3b761d9d23b186f84b8d244d183dfec1bcca40c10fb8be1f
font_02_sfnt_off00017236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17236 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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