Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18a071d3783b7ff…

MALICIOUS

PDF

71.7 KB Created: 2020-11-24 17:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: bfbfc2c920cb8b8cd3630dd252603b57 SHA-1: 11bd81fe0b0e44295e57f4a14e04a95ffde9d432 SHA-256: f18a071d3783b7ff417e249b817c4f97c875675be7438f1e2a1961dd3566b459
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL suggests a phishing or malware distribution attempt, masquerading as a QuickBooks template to entice users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=quickbooks+desktop+import+chart+of+accounts+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5fbc3c7ee4123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f949dd7ea358.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/d4908033-8d95-436b-9f52-4bd5e157215c/wulasavolerakeluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968f23dc-84a9-4ca4-a8dc-d5ebf8dc4828/tonowuxuwol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c277d9-9618-4483-93e7-ba800d739154/vepekidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e71124-a9a2-4736-9acc-15b093ec19a2/pupibuputufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7989a1e6-3812-4be0-bbbf-897475e7c108/biochemistry_vasudevan_free_down.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/video_klip_blackpink_forever_young_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adae2c4-8df1-429f-a3ef-501ebdeca8ce/nomes_de_vegetais_em_ingles_e_seu_pr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27937407-d23a-482b-b996-1f9ba425e91c/85652716906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b38dcb2-0474-4c1e-aa26-1f19c7352d1e/the_skin_you_live_in_read_aloud.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/59768409913.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_off0000db87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB87 5660 bytes
SHA-256: b42fcd33fac3307da04dc8e240091a1643e33d9001222c6529fec325e531438b
font_01_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 10236 bytes
SHA-256: 4e8d523f8c50b7b635544301e3e8c4789f24ef7dab10d716a3cd186493760d04

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