Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e67bac5e3eef8b…

MALICIOUS

PDF

61.8 KB Created: 2020-12-27 09:06:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7c563e7ef9c76db6f1296e0e9d83e9ea SHA-1: 47b3936d41084bf7b20a1048a9288fc2945a056b SHA-256: 47e67bac5e3eef8ba4c0fa46aee77dfda0463b0a22c89d74d97549917c452947
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating a strong attempt to redirect users to malicious infrastructure. ClamAV also detected the file as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malicious redirection attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/strik?utm_term=bingo+song+lyrics+youtube In PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/pofajuzirusedaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5fb3f4298788c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464700/normal_5fddcff761c6c.pdfIn PDF document text
    • https://cdn.sqhk.co/walumupo/ijBhcoB/40800394095.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/4388791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480173/normal_5fc2630c5b5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5fadabab2de74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421781/normal_5fcc8b413faaf.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/82e00652-ded8-4915-b89f-d639bf4297d9/10229869092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a58de98-5d4e-46c4-ab9c-a1e96a2df415/asphalt_8_airborne_hack_cheats_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb485d1c-0cf5-49c9-b937-fff19e68a476/zekidizofekew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a4a68f-778a-4120-8c7a-0fe0e925d30d/lazewaluvepejuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9abdc5a2-2e3d-48c3-be2b-48b72027e011/mongoose_xr_75_21_speed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f7d325-389f-4d20-8453-c0050a570fc0/video_production_contract.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_off0000b627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB627 5048 bytes
SHA-256: f59bf819978d2545c1fa1b1e2e78b39b29d3081595f392f238975828f66676e2
font_01_sfnt_off0000c77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77A 10304 bytes
SHA-256: cfe9f3e591a99bfeb74734e75086403a8d74c0f826e04c03618189153ac47218

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