Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d6ec6e4cac8387…

MALICIOUS

PDF

70.5 KB Created: 2020-12-26 08:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: cb02d9eeba3bef77883965e42c50057f SHA-1: b5e0f96b7549641c674089a1714edca66290780d SHA-256: 02d6ec6e4cac8387b3d09376c4b8b4523646f19a4a69a38e960e1ac7dc97bcf9
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external links, including one identified as an SEO redirector, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a tactic of luring users to external resources, likely for further exploitation or credential harvesting.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=employee+of+the+year+certificate+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463543/normal_5fdf519925a5c.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/popefonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468836/normal_5fbcaa9dae40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f9c536476316.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/151c5911-9cdb-4dc6-9d4f-1a7332b82ec9/model_house_kits_michaels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14482a35-15d5-4f4c-80f8-16d81121f25b/megipulowosemaforisub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96be764a-2e18-49d9-ac4d-bc334dd87fee/sports_board_games_online_with_friends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5231f94-b1d9-4473-9b59-206e781772c4/20675233158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da5d264-2a4d-4341-8baf-391b078ff0eb/lelaluvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a80013-2bd3-48c8-957d-33fd2b855cc5/gagatololorisimubumifedik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f814f23-6092-4cc0-90cd-7cc87ac551fc/nyu_internal_transfer_deadline.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_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 5276 bytes
SHA-256: fd6c49f5f2f385191cc3e493201792fcaffce941fa66d551bcacb6f2c06e3967
font_01_sfnt_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 10724 bytes
SHA-256: e36aaf44ff9641e268796e5dbeca99759fc3e3b1c8516b4cc910daa24148870a

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