Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1772651eb140f77…

MALICIOUS

PDF

63.8 KB Created: 2020-11-25 18:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b9518c6d4bd96e7babc87a06c68e1056 SHA-1: cc4e999d04e958bec0da9004c544f07ba7308dad SHA-256: e1772651eb140f770dba66074c4a8e793427a2b4f3d718365d5fb4bf93bb0a90
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on strikinglycdn.com and appear to be part of a link farm designed to manipulate search engine results. One of the primary URLs, 'https://traffine.ru/123?utm_term=minecraft+iron+ore+texture+16x16', suggests a lure related to Minecraft. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://traffine.ru/123?utm_term=minecraft+iron+ore+texture+16x16 PDF link annotation
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/zuxatipixorufu_majatewil_lejebaxozuji.pdfIn PDF document text
    • https://rozapalevode.weebly.com/uploads/1/3/4/7/134705228/2762776.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/4cb99067-7146-4a3c-965d-a3b272d54b70/79581403014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9061444e-2128-49a1-955c-d1c9ce2cf24a/62690450805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e596b086-b17a-4489-b6fc-0ff8c70bd182/dish_network_receiver_722_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/types_of_carburetors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d871fecd-8642-4ee5-b274-1088979c357e/jedivipejodazukawufise.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/manual_lawn_mower_bunnings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba10ba5-a3da-4983-b93a-9041246008dc/fagurigodoketi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9db55a2-83f2-485a-9015-fa6cebd0d94a/92309064689.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_off0000c030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC030 4944 bytes
SHA-256: d2004460db93c2b921309a0d47f320713caada8bc6d3c81c734e69390ef11e38
font_01_sfnt_off0000d12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12A 9992 bytes
SHA-256: 2527375a51b60b136eff35a8d164368e620eae62e3f70b105ff871982d6516f0

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