Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b9b2682c09362b…

MALICIOUS

PDF

76.0 KB Created: 2021-01-03 04:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5a28bab9abc97ab5bb5c4706f658ed20 SHA-1: 9c2f7c06dc9f5899430336cdfb5fe3ca10d310ba SHA-256: c2b9b2682c09362bd3e51c741c9c6bd9e52c8fd5655197c78c395ff75cb9e53e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs is https://traffking.ru/aws?utm_term=best+boat+loading+guides, which likely serves as a lure to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=best+boat+loading+guides PDF link annotation
    • https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/negexi.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/57422.pdfIn PDF document text
    • https://gobuxasab.weebly.com/uploads/1/3/4/6/134608876/ribufoxirokodexen.pdfIn PDF document text
    • https://jufujepil.weebly.com/uploads/1/3/4/6/134650130/7c3ea0dfbff72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f9c1ca313a44.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/lanezo_xusuxuguwikati_raroviz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378843/normal_5f8bed5730ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f88812ec2685.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/3ec8cb9a98636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fbf23f73f4a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06383a21-eab9-4e7d-8187-3d9d297f105f/scandia_308_wood_stove_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eea939b-d14b-457f-abd7-94f78a4b881d/16662399966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0abe70c-731d-403a-95f6-dab826029912/keanu_reeves_shooting_range_halle_berry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749b4db5-c749-478b-95e6-0a330735ea8a/fezugunevuvavasawagu.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/bin_sachivalay_question_paper_2016_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29131436-2b5a-4165-bdd1-2f5fd128872b/bufomo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/3505581591.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_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 5088 bytes
SHA-256: fa8343bf7e8ff3bc28e7ee735e056289e56d814dfa477cd9e082f2afbdf6394d
font_01_sfnt_off0000fefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFD 10428 bytes
SHA-256: 4a55a44d297cf8e00d1e917d65a58930bfbf1201d23eb2b977a124296e19ad77

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