Malicious PDF — malware analysis report

Static analysis result for SHA-256 d456a3f158154464…

MALICIOUS

PDF

60.3 KB Created: 2020-11-25 02:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a9d51ccd77cd6cea1bda56b1a261ef7c SHA-1: 916a417020fd467b9614e0a2d687f080ddfa8dd4 SHA-256: d456a3f15815446466def4e9073b70e3396cd31831cfd43a84c41a453e9bf6e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain 'traffnew.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://traffnew.ru/strik?utm_term=variable+resistor+symbol+gcse PDF link annotation
    • https://rowofijiguni.weebly.com/uploads/1/3/4/4/134479741/8227395.pdfIn PDF document text
    • https://tedenugimug.weebly.com/uploads/1/3/4/3/134345185/tarofamalimukisa.pdfIn PDF document text
    • https://modatubegawaso.weebly.com/uploads/1/3/4/4/134491319/bekimazebub_bavawifixudo_subapidaso.pdfIn PDF document text
    • https://nulumekut.weebly.com/uploads/1/3/4/3/134373747/9867926.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/jexijer/general_science_biology_mcq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a41f9126-7abc-4b89-ad46-456642a9b211/planilha_de_avaliao_fisica_excel_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c3f5f7-161d-4df5-9085-4e3a005f5dda/beparodibabeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fafbc14-8238-401c-ae1b-09e6efb38ca1/jezegewodobopozi.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/zonegidekunaninojoxuxoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1472e4f3-86e9-4cc5-af1e-2baa869a8eac/akai_timbre_wolf_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78c52d3-f4ad-4665-88ad-e231f8d63b65/gta_trk_indirme.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_off0000aec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC3 5324 bytes
SHA-256: 06fcdc0128b320579a71eeddf653328f9edc9562bb3a8ba1ebefcda239e8b6e6
font_01_sfnt_off0000c0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DA 10804 bytes
SHA-256: 8c1550e9a4b18287debff2c0caf818f9e59e4b4338450de24a698a2cbd03033c

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