Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f9786ce083157…

MALICIOUS

PDF

68.6 KB Created: 2020-11-28 21:39:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5293d1be9a1637e57b324739e614967d SHA-1: 7934528524fb23a35512d1208f03ad5ea190274f SHA-256: b32f9786ce083157acc5917d1ef2812f759d38bfe8c806596022e25d01916601
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam campaigns. No scripts were extracted, but the presence of numerous external links suggests the primary attack pattern is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=samsung+safeview+baby+monitor+manual
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/5041473.pdf
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/fuveronegebisak_mizomexesepojan.pdf
    • https://cdn-cms.f-static.net/uploads/4451348/normal_5fb8c4b1ced97.pdf
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/9061107.pdf
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5faea22306098.pdf
    • https://dinoromakutaxe.weebly.com/uploads/1/3/4/4/134479472/3160978.pdf
    • https://mobugozuko.weebly.com/uploads/1/3/4/8/134869294/xepevolojob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zikeko/bukowski_donne.pdf
    • https://uploads.strikinglycdn.com/files/9f010653-bc2b-4c8c-8b7b-0bc2b51e6a72/mugewoxejifobaruwope.pdf
    • https://uploads.strikinglycdn.com/files/5bc534ae-ac88-4cb5-82b9-bcaf35c08bff/6th_grade_math_interactive_notebook.pdf
    • https://s3.amazonaws.com/zazelujeju/liwavapoluxuxesoduza.pdf
    • https://s3.amazonaws.com/dazinibonofobi/radical_candor_online.pdf
    • https://s3.amazonaws.com/legipalofi/zarudixirep.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_off0000d051.bin
bddab32b8eee0d71b19f7c2ee33e0d3d7af567d0c077b6450e376cfa965001ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 5584 bytes
font_01_sfnt_off0000e35e.bin
6d3cd965d7b41cea7367fa2f20c68f9dcf8ec919763cd563335b4a642f1363f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 10160 bytes