Malicious PDF — malware analysis report

Static analysis result for SHA-256 1484b80ffaca21c8…

MALICIOUS

PDF

75.5 KB Created: 2020-11-26 03:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3ef16f0faf42ef7258ed2da9a9808d6e SHA-1: 06814d7c196d54c163fcc28435f9ae2b3342b67b SHA-256: 1484b80ffaca21c86637dfd0c3c22ce6b903ce9f6892ef0e73e2093d41b406b2
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with SEO-friendly terms like 'rise of the tomb raider strategy guide pdf download'. This indicates a phishing or scam attempt. The PDF also hosts a link farm, suggesting it's part of a larger campaign to distribute malicious content or drive traffic to compromised sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=rise+of+the+tomb+raider+strategy+guide+pdf+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_5f9b16790d8ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f8d3032dc663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f87140bdc887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5fbd1451d9555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f9336f572252.pdfIn PDF document text
    • https://refaxoke.weebly.com/uploads/1/3/4/6/134602084/gapisopuvekimaxenad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fba8628b0214.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/5a09de4c-ada2-4319-8766-79b064b0b1af/74548595986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8efd4b8-17bf-4c67-a124-a798f7183bfb/29912612041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d4fba4-909e-4606-b17c-3fbeef135e61/mizowuzugubaxef.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/guide_book_of_tcu_tanzania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b16986-de08-41c1-8ed5-11fcaaa58dc9/zawoxavakosokisosasaxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b4533c6-c539-4d68-85d3-bbb4965e6372/8593530153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10ea6b56-e67b-498f-ae38-9716fe21e73e/happy_new_year_2020_to_post_on_facebook.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_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5796 bytes
SHA-256: a245b8ace3b2fa85316929c99a8dc5302c52aa6690da40b5cd27cb4d6140a83e
font_01_sfnt_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 10628 bytes
SHA-256: 6d8c6bb4f3fcdf0713be47398b9eb09748e5a334e8c0ad0532b0e9b8b70f89d3

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