Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0d03efca7d1838…

MALICIOUS

PDF

70.6 KB Created: 2020-11-25 02:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 207687f5980f070eeb2c6fc995e37949 SHA-1: 74dfacf11253fed24a97cc53281a43ee68d6f266 SHA-256: 9b0d03efca7d1838ba5523fe48d5cfeb2c0144c89a1c07ff6bb702ccfb787919
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or redirector. It contains a large number of embedded links, with one pointing to a known malicious redirector. The document body is heavily obfuscated and appears to be generated content, further supporting a malicious intent to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=i+can+only+get+so+fancy+lyrics
    • https://cdn-cms.f-static.net/uploads/4392867/normal_5f8eb1901be75.pdf
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/wukoboluvezej_manumedigo.pdf
    • https://cdn-cms.f-static.net/uploads/4467027/normal_5fa57af7d3a89.pdf
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/lidizatiloni.pdf
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/02b984e90a2de.pdf
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5f9b5f753ad7b.pdf
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/dumepa-vomunedojaxov-nofeza.pdf
    • https://rufamuvobaj.weebly.com/uploads/1/3/4/7/134720601/2540742.pdf
    • https://cdn-cms.f-static.net/uploads/4443823/normal_5fbd83aacb2c0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8f825624-8886-48e5-b0c7-ed1b7da7f585/34662739927.pdf
    • https://uploads.strikinglycdn.com/files/19a50e74-e3d5-4371-bd13-5beb2a052a3d/41252228569.pdf
    • https://uploads.strikinglycdn.com/files/7601319d-72b9-43cf-8753-9d4a8661bfa9/78045565336.pdf
    • https://uploads.strikinglycdn.com/files/fa0aaabb-72d8-4691-94a6-333a7d0fdfbb/productos_notables_al_cubo.pdf
    • https://uploads.strikinglycdn.com/files/236d7c1b-9bee-4b2a-ac01-77b43a1e4e7d/comment_pour_nettoyer_squishy_balle.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d83b.bin
7ff07c82ab9923938e5826630db316d7ef9a7c21c2e4ef05944933fea233f3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 5088 bytes
font_01_sfnt_off0000e9a6.bin
61dfb5c596fa92d53f22533456adb606edbacf3d0f9ab7c44a9544f5bd01b3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A6 10548 bytes

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