Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5215f9d6242c12…

MALICIOUS

PDF

78.5 KB Created: 2021-02-28 23:23:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2529c0891c9e2663e5f9a54b071608fd SHA-1: 89b7e81a6aaa947e5391aed2157a85192a5ac85f SHA-256: 9e5215f9d6242c1267b5b163955b1bf65b61b228ceb0d1beae8e8781760b8316
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as downloadable files, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious sites.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=pl+sql+interview+questions+capgemini
    • http://dfahsdfgjsfg.online/dora_malayalam_cartoon_video_free_downloadcrmec.pdf
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/motigiva-wajozuvodaro-jubudoraxubaz-tusigosarajujo.pdf
    • https://fawitazekivaji.weebly.com/uploads/1/3/1/4/131454143/6006996.pdf
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/kever.pdf
    • http://hookup753.fun/class_7_math_book_2020c5zr3.pdf
    • https://cdn.sqhk.co/raguwubives/gEgxs0S/merge_racing_2020_mod_apk.pdf
    • https://cdn.sqhk.co/guwuweri/UqPF0id/screen_recorder_for_iphone_5_app.pdf
    • http://activa-fb.com/decode_and_conquer_downloadxrsjp.pdf
    • http://taxevidel.medianewsonline.com/koledilemunumezuxog.pdf
    • https://cdn.sqhk.co/buzivafulet/ahaEEjh/bipanemuzedapozo.pdf
    • http://ptmonline.ru/31584433343dtcw2.pdf
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/dogak.pdf
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/7225635.pdf
    • http://alsamcctv.com/8640393662031y56.pdf
    • http://napufokotipo.getenjoyment.net/50146688824.pdf
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/73fd80948cf660.pdf
    • https://cdn.sqhk.co/menodotitit/jdnjcgi/nafugumugoza.pdf
    • https://xotonibesil.weebly.com/uploads/1/3/1/4/131407892/xuvimavet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f43b.bin
34239b4b9d42546cf2798eb912daa1734d36c55c0a5a5287282e8a607938501c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF43B 5532 bytes
font_01_sfnt_off00010711.bin
c67d12ad794527543110c404029e701822f27e2b2b95abeb45810b746af1546d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10711 11204 bytes