Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca945cc015bc01e8…

MALICIOUS

PDF

76.1 KB Created: 2020-12-28 17:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c88e499d238b9701136321dcfef59107 SHA-1: 9fc9b84bcf20e8580c16787685eebedd8875140c SHA-256: ca945cc015bc01e84f2ef6898138014539ebe908356472eb2a25611a777d8864
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a primary URL pointing to a "hack download" for a game, strongly suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffking.ru/strik?utm_term=touchgrind+skate+2+hack+download PDF link annotation
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/1215a4f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa8971f5a263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fa42ab8d1e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_5fae9f6674a0b.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f873d42ae81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409114/normal_5f98cc9d91694.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c02cf41b-ca16-4ebc-8d20-289ca0d23fbd/94109599165.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/7889225265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0c59e8-e416-410f-8ff6-0f95e74ed677/jobamimozu.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/faxoxofuxav.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/luke_chapter_10_verses_30-37_sermons.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 5320 bytes
SHA-256: 09b188a8b624cffa31560d1caf1bcd141e44ec213f470c71d1a4a9c1a9cedfef
font_01_sfnt_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 10216 bytes
SHA-256: 476d4d6bccfc7753b59fbf0b47f3cdf00a2270aa896a37811a8efb143f844cb8
font_02_sfnt_off0001135d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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