Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cc14db720e0278…

MALICIOUS

PDF

62.1 KB Created: 2020-11-26 05:57:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ccc8ae8331376bc458aa31a64baff02 SHA-1: deaaf8e5f4a46494032cce0eecce16b43a2aedcd SHA-256: 93cc14db720e0278cca43d3ff53b119cbe866314cc5a6a982f7e7f49526392a2
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 0.9995

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://trafficel.ru/strik?utm_term=borderlands+3+gibbed+save+editor+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5f9ee3f646165.pdfIn PDF document text
    • https://fekogekakoxoki.weebly.com/uploads/1/3/4/6/134625435/2067750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixatax/94794674111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a82cd5f-b137-438a-ad10-1dc6eebaef2c/juvelifarunepugodibu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/amazon_gift_card_generator_no_survey_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5c945d-092a-4c50-abb1-257cb1cb2067/nupajujusoxiraxuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/82670898628.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/87886848346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa148fd-bb72-4a00-baed-05339939de12/videos_of_dent_repair_kits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78d44342-cb78-4912-9c2a-ed2ba6d95734/11198292508.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_off0000b3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FF 5680 bytes
SHA-256: 45ff34257637a4240305cacf3fe0ebddc31eb4f6653242d6b8afd7214f2c549c
font_01_sfnt_off0000c766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC766 10848 bytes
SHA-256: fa81b8ae04a24fd24d7e92972418c2fb9add39aa45d30b17971da5df14131f24