Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1c6dddc1d16eb5…

MALICIOUS

PDF

67.5 KB Created: 2020-12-18 13:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 71ba4abd6ccbc7c920e30292c0f3b48b SHA-1: 45c8805b230535838ce0794821c23a1e7bff4120 SHA-256: af1c6dddc1d16eb51bf3fd80e8fe5dfc91f979f86c17435e9969d278ab174b88
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=kendo+ui+grid+template+if+statement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476758/normal_5fbe55a633258.pdfIn PDF document text
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/dakufa-navejikesepok.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/metirumijerazafenavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f920b9115d49.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/678a13a5-45d8-4cc8-9e64-407f42f85e6e/young_s_modulus_of_carbon_fiber.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/aide_au_logement_caf_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/xivigate.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/79029969186.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/nord_vpn_pro_apk_cracked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e302ab55-868a-4b18-9bac-56cba1e856f8/batudil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270ecf67-3585-4019-91d2-14c983e2a946/tigojejixubofozopilejikap.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/centre_de_formation_agent_d_escale_paris.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_off0000c2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E7 5328 bytes
SHA-256: dc99a154d48e442f42d2716090d40742132ea99d4164a426af33d5501682e6e3
font_01_sfnt_off0000d4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FD 13988 bytes
SHA-256: 48d80179ea279c89a15fd0cbb6a5c16417aa2474fed98908b2cc42a6be115fd3