Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0753be58f448744…

MALICIOUS

PDF

59.9 KB Created: 2020-11-17 20:15:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 245c8850193cb10a0b80dca064051183 SHA-1: 5753d3953e0ebc8cf4e707e660efefca2a43ed4a SHA-256: b0753be58f4487446209937d403a30825ff49b0fc82fb6657fa73efcfb0b5efe
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or scam attempt. It contains a link farm with multiple external URLs, including one that points to another PDF. The 'SE_CALLBACK_LURE' heuristic suggests the document may prompt users to make a call in a billing or security context, further supporting a scam or phishing motive. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffset.ru/123?utm_term=indigo+by+clarkes
    • https://cdn-cms.f-static.net/uploads/4412160/normal_5f9de9069adc7.pdf
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/3c840056.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/sesakaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2e922355-75b7-48a9-8992-464f153b5a92/66591081782.pdf
    • https://uploads.strikinglycdn.com/files/c5301ec8-00cd-4573-80ac-7faeb57d4dc4/chase_mortgage_address_for_payment.pdf
    • https://uploads.strikinglycdn.com/files/6e349376-a844-4ddd-a4a7-3f81945d8c37/bekivakopaxabajetane.pdf
    • https://uploads.strikinglycdn.com/files/36494d4d-4675-4401-9499-6a2f1f14ad21/68061327009.pdf
    • https://uploads.strikinglycdn.com/files/2c5f31ef-9acb-44ea-aaea-0f898edb7ab6/69356176451.pdf
    • https://uploads.strikinglycdn.com/files/e8aac2ea-5187-44d2-abef-2940a195e603/5_ejercicios_con_notacion_cientifica.pdf
    • https://uploads.strikinglycdn.com/files/607a7f84-8ab9-4949-b18a-241877ef7df7/bemitixe.pdf
    • https://uploads.strikinglycdn.com/files/9719c997-e14a-4028-8bb7-042b9b4afd30/dowemefogamofipu.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_off0000ad15.bin
fb1bf2cecba3f193562d8a33220248dcd7ae6604b3e183a74c6aa103b171692e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD15 5352 bytes
font_01_sfnt_off0000bf5f.bin
96a7d3a03c17b99cdaaf3104d8aeb22eaeb211e4525b7453744643c85c2fdabc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5F 10552 bytes

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