Malicious PDF — malware analysis report

Static analysis result for SHA-256 003dc60da57b2255…

MALICIOUS

PDF

68.5 KB Created: 2020-12-28 01:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0900de8b9c3e10d3452382ad27dff90e SHA-1: b997b9d563e1712a8a86ec2145c50d91c9a322dc SHA-256: 003dc60da57b2255f1f88d79d9a5d6041c40833d339f616a19c0d667a7788e6f
186 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. 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 0.9999

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://traffnew.ru/123?utm_term=digital+stream+remote+programming PDF link annotation
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/8515663.pdfIn PDF document text
    • https://losanuritajog.weebly.com/uploads/1/3/4/7/134730792/1051783.pdfIn PDF document text
    • https://sebijulevezokoj.weebly.com/uploads/1/3/4/5/134512917/mutut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448357/normal_5fe5915a4468b.pdfIn PDF document text
    • https://jugujepatuw.weebly.com/uploads/1/3/4/9/134900825/1b8af26f.pdfIn PDF document text
    • https://tiluzapibijodok.weebly.com/uploads/1/3/4/2/134265907/6044005.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/c6ce7262fc04.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/e628577d-44a4-49b6-bd94-6b2a80813260/menubuxamumuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/65940163616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7b120d-6483-4898-8241-0e6e09f48523/papogufisexofagovilow.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/telecharger_encyclopedie_universalis_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653215f2-b78e-44e7-989a-b3e03a993c32/me3_tuchanka_mission_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e526e2e-a294-4a36-b594-373053dbf7e8/how_to_cook_barley_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8bc523e-f67b-4f1b-8085-7973d3a28113/admiralty_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d907331-8cff-4638-9118-d76c8f2b68a9/45849270081.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_off0000d01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD01C 5136 bytes
SHA-256: 1b26b53a0600583cfb8222342463b9b30ec287bbaacba8a344a5943d07315952
font_01_sfnt_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 10480 bytes
SHA-256: 080c6816c9d40cd576012327a3c1afc3775f3f29c73602e8757fd63035574db0

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