Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16a908ca7e0561e…

MALICIOUS

PDF

233.1 KB Created: 2020-12-27 17:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c984456c407adc1b288e2ee218a543a5 SHA-1: 9627ea50fc0ea51dfbe24ff7f23b69fc4c434fa7 SHA-256: b16a908ca7e0561e205a88e7fe25c8e0c6c9b83552878bc8c3337ee2b853643a
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, traffset.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/aws?utm_term=concise+algebraic+topology+pdf PDF link annotation
    • https://tugufotekaluxaz.weebly.com/uploads/1/3/4/8/134883762/81d5755bdf4411.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/93be467.pdfIn PDF document text
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/4128483.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/mawipubowibetin_pelesibatomo.pdfIn PDF document text
    • https://jozurukezareta.weebly.com/uploads/1/3/4/7/134741488/riwip.pdfIn PDF document text
    • https://puwowuxavuz.weebly.com/uploads/1/3/2/6/132682233/nejuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5fc00650aa3bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5fd91d088957d.pdfIn PDF document text
    • https://buroxaserojer.weebly.com/uploads/1/3/1/0/131070485/bevagexebesowoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fca031a9f20a.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/ce398187-f111-4698-ad45-9836b6e0df4e/in_case_of_fire_git_commit_poster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f60a798-768c-4a10-8238-bf0885a3e995/fagoseseni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be800ebd-7d9b-4d5a-8989-f6a3bb5a3e0d/pajamesuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5210da9-8c1d-4633-a787-28da58b9486a/turojavijabiz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003264b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3264B 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0003308d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3308D 5472 bytes
SHA-256: 6f09e35b641bff0d4347c47a1421951acf5c6dc2117f985007609563df6e8b70
font_02_sfnt_off00034337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34337 17500 bytes
SHA-256: acf2e3534bb6bab48644bd8cb5d678864774d69c3edc4ae2a69e55d09540cbdd
font_03_sfnt_off00037c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37C35 17588 bytes
SHA-256: e53bf8eb3f0c80dfe583e80969ffbeecb2c48d50c9fddf1902d42ee035d75446

Open this report in the interactive analyzer, or submit your own file for analysis.