Malicious PDF — malware analysis report

Static analysis result for SHA-256 08dd7f6282e118f5…

MALICIOUS

PDF

72.9 KB Created: 2020-11-14 03:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f15821a3596de7d431b5413e3a9d4c45 SHA-1: ee3325fcd79a964ac271ab506bfc9b28f3d0b9b5 SHA-256: 08dd7f6282e118f53a1b60735f9c1d3387146687925dd03b1d345fe3a1fb50e2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains including 'traffnew.ru'. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically as a phishing or trojan distribution vector. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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/123?utm_term=charles+county+fairgrounds+fireworks+2020
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f8ae83515a7f.pdf
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fa792df20789.pdf
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5f9c61d5f30f3.pdf
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/8271441.pdf
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f944634328e0.pdf
    • https://cdn-cms.f-static.net/uploads/4377642/normal_5f8ab53541ea3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4b1fad4d-3032-415a-a796-10f3aae510f5/teddy_roosevelt_jr_d-day.pdf
    • https://uploads.strikinglycdn.com/files/e645dc26-4c17-464f-8bd5-148dc31cd979/bojefebiwovebaxemo.pdf
    • https://uploads.strikinglycdn.com/files/be150476-b2ae-4261-87c9-38a47cfab1e8/rikotopipaxufarever.pdf
    • https://uploads.strikinglycdn.com/files/a7ca8ca5-4deb-473f-bd74-2a84337df323/karanln_elli_tonu_indir.pdf
    • https://uploads.strikinglycdn.com/files/dc544ade-6822-417c-a7e9-4dabf9d77c62/fgo_edmond_dantes_dialogue.pdf
    • https://uploads.strikinglycdn.com/files/47cbd2f8-f3db-496a-8235-32dc7b1e22e4/bacalaureat_2015_engleza.pdf
    • https://uploads.strikinglycdn.com/files/9434cc4f-3e9d-4446-accf-40d84b137f75/amber_alert_2012_full_movie_free.pdf
    • https://s3.amazonaws.com/xefejevife/fekesenoweketi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceb3.bin
a2cb610d6976e68ffc2cddad7d4e97c8b59304b7c405f4101a819c5a24565469		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB3 5720 bytes
font_01_sfnt_off0000e241.bin
09577c37460ef0419243b4014dcb50bc817860645145e42f3121420ee044919b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 11408 bytes
font_02_sfnt_off0001089a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089A 4324 bytes

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