Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b2a8b0c6e34247…

MALICIOUS

PDF

79.7 KB Created: 2021-03-10 17:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f0b9acb632a454313eb8a5e4f4e7b52 SHA-1: 9205c4f9d41838f4a7411ea6daf19fbf91cb9980 SHA-256: 94b2a8b0c6e34247135f5baab141d6c7f770d8e48be9d393cdc003557be1b282
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and other free hosting services, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=norwegian+clothing+designers
    • https://vobuzotoxat.weebly.com/uploads/1/3/4/7/134705481/8668011.pdf
    • https://xuxedujuwa.weebly.com/uploads/1/3/5/3/135345360/gubegujukiraledig.pdf
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/471423.pdf
    • https://velademepol.weebly.com/uploads/1/3/1/8/131871907/6808092.pdf
    • http://fexevewuli.mypressonline.com/fepuw.pdf
    • http://bipowilago.mywebcommunity.org/the_tibetan_book_of_living_and_dying_audiobook.pdf
    • http://nadefememidep.medianewsonline.com/panasonic_cordless_phone_troubleshooting_no_link_to_base.pdf
    • http://dasiwujupuna.sportsontheweb.net/gupap.pdf
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/puvudul.pdf
    • https://pigokujedaxe.weebly.com/uploads/1/3/0/7/130740563/9c927cd479.pdf
    • http://vizojuzoninunoz.scienceontheweb.net/hoover_power_path_pro_xl_carpet_cleaner_manual.pdf
    • https://vexikolilugurud.weebly.com/uploads/1/3/1/3/131379290/wokexujifejabox.pdf
    • https://gelixilononusi.weebly.com/uploads/1/3/0/7/130775878/danije_povubogaf_ramikopinaxazu.pdf
    • https://ligelonajoka.weebly.com/uploads/1/3/1/4/131407163/5893271.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dazemi/govamaton.pdf
    • http://vesedakowata.onlinewebshop.net/lajereludikalugosaju.pdf
    • http://xomapagovujux.atwebpages.com/hot_springs_grandee_control_panel.pdf
    • http://gubawakelu.onlinewebshop.net/jexupemamegukavutiratuwup.pdf
    • https://s3.amazonaws.com/sevoga/gitixarugesapifodigirusa.pdf
    • https://s3.amazonaws.com/kuboki/pawapomebumelizo.pdf
    • https://s3.amazonaws.com/kumasala/33946076873.pdf
    • https://s3.amazonaws.com/bupaxomu/788953162.pdf
    • https://s3.amazonaws.com/bizamesuwepe/canadian_ctas_guidelines.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_off0000ed6d.bin
b6cfa79f7b765ce8775b1e9ea91dd994541a1fd767495bcef1e3ce925b49ab99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 5048 bytes
font_01_sfnt_off0000fea1.bin
dfcb2cc6b52cfabb21ef6c6002b7cafd5624d256ab789c70829496192b7434e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA1 10604 bytes
font_02_sfnt_off000122de.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122DE 4324 bytes

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