Malicious PDF — malware analysis report

Static analysis result for SHA-256 0081cc627782ec64…

MALICIOUS

PDF

78.0 KB Created: 2020-12-27 22:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e7e2b460232ec0301ce34227bfe4d41 SHA-1: ee559db57a7abcc18950cfe4f95f5d61ca21b231 SHA-256: 0081cc627782ec6471383dbe73991647256b55b71efe15df4e8bc727f115c357
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL (https://trafficel.ru/123?utm_term=what+is+ifak). Heuristics indicate a 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS', suggesting the document is designed to host a large number of links, potentially for SEO manipulation or to distribute malicious content. ClamAV also detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and linked URLs point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/123?utm_term=what+is+ifak
    • https://static.s123-cdn-static.com/uploads/4485161/normal_5fdcb101c09d9.pdf
    • https://cdn-cms.f-static.net/uploads/4389797/normal_5f93cf5092787.pdf
    • https://cdn.sqhk.co/kewudomavave/fehjtdw/pigtronix_infinity_looper_2.pdf
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5fa69c6d6579f.pdf
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/6856206.pdf
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f939f524285a.pdf
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/doxufi-vuwuzubo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tuzamada/alzheimer_indonesia.pdf
    • https://s3.amazonaws.com/niporofez/remove_watermark_from_powerpoint_template.pdf
    • https://uploads.strikinglycdn.com/files/0a6d3f7e-194e-4ef1-ae8c-fb306d9e6871/9_snf_almanca_kitab_cevap_anahtar.pdf
    • https://uploads.strikinglycdn.com/files/e968972b-577a-486c-833a-72fef6b0561e/71954271516.pdf
    • https://uploads.strikinglycdn.com/files/cdfafc2a-0197-4718-aba6-d08a8d214ac6/kuselepivutidekuxava.pdf
    • https://uploads.strikinglycdn.com/files/d1d17003-2fb3-4dc8-8af3-f055f1686299/42641162527.pdf
    • https://uploads.strikinglycdn.com/files/d23a44e9-6ff3-4a08-ac85-4e80b0c07776/fatidumuzapedolokameza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f530.bin
f34d14fed361c858987ad4f1b3e46679e71c2b89fd1846564891cce4d1a89b65
pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 4804 bytes
font_01_sfnt_off0001059a.bin
9700aee48a504bf8be5a6c37e140740b31617733cac79746a92892e540a9b586
pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 11132 bytes