Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0567c43ff91391…

MALICIOUS

PDF

69.3 KB Created: 2020-11-19 19:21:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c7b7d05b26ed167d597c3941240028b SHA-1: c2c0efa0f18ce438c17579c6dcc4485cffc39e63 SHA-256: dc0567c43ff91391128d78e8e9c8f2f597d669f80f88564c1e649dec98533ada
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with text suggesting it is a 'Star fox 64 speedrun guide'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded malicious URL are sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://gettraff.ru/123?utm_term=star+fox+64+speedrun+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f986b0c1d9e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f91fec59203a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414500/normal_5f9fefd53fba7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5fad1120705b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393754/normal_5fa4b3632f2d0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dudurat/apple_tree_leaf_pattern_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd2310a-d657-4256-9a04-80dd13580159/zokigeriseselivip.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/xanijipiridupowododi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9aae58c-70ee-401d-b39b-f8fb29e0bde0/golden_duel_hacked_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bde3fb8-cbbc-41b8-b8de-9460945faea2/wuzelawimerisave.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/application_letter_for_volunteer_work_in_hospital.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/78370581768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092b2cdc-34bf-47d8-bc2b-667930aa5055/petey_williams_scott_steiner.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/12212670921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d86cda08-6b4c-4452-99ef-13c2d2a30bbb/hemi_performance_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8186ce5-ae85-4ec6-ac0a-89bf3d66f6bf/silah_oyun_indir.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_off0000d1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A8 5592 bytes
SHA-256: 6f645af40b4ce3ef0355ba7843c5c421b295bbfa298456600577268b2743a9ea
font_01_sfnt_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 10688 bytes
SHA-256: 419a738a2e9673622189efd7a56fff546d0ef677454df6371c811fc2c38bcd76

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