Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f36759cab356ee0…

MALICIOUS

PDF

95.6 KB Created: 2021-03-07 19:57:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1dbcad3f5fe3984dedf67b8704c589b8 SHA-1: bb82ab1f2e67c1ca8f792c91db05808ed1b92835 SHA-256: 9f36759cab356ee01ef9d798bdd30a87f0ab29f91d55c4bd740736e94dd305fe
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with the primary one being 'https://mezovuduw.ru/wix?keyword=weston+manual+meat+grinder'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further suggesting a malicious intent to redirect users. Although no scripts were explicitly extracted, the presence of embedded URIs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=weston+manual+meat+grinder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fd3883f943e8.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/xutifix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467003/normal_5fce355d7f8cc.pdfIn PDF document text
    • https://femuketidoxesi.weebly.com/uploads/1/3/3/9/133997502/777041.pdfIn PDF document text
    • http://tujemet.scienceontheweb.net/1607233449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_600b2a33bf1a2.pdfIn PDF document text
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/d2f8ed022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_60155a4b7fc2a.pdfIn PDF document text
    • http://rofuxipof.mywebcommunity.org/how_to_train_for_soccer_fitness.pdfIn PDF document text
    • https://mejotowud.weebly.com/uploads/1/3/0/9/130969644/komererelizod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466676/normal_60242cfbc97e5.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/sovexodevuvavujobume.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451369/normal_5fcf1047011bf.pdfIn PDF document text
    • https://junimadegerozo.weebly.com/uploads/1/3/4/0/134096607/temowegimofowowij.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/79637981129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489402/normal_5ff605edeed11.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/gevale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_6010e87da1756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitufuluxa.epizy.com/zagiba.pdfIn PDF document text
    • http://xebifiwogilimun.epizy.com/what_is_the_best_brand_of_push_lawn_mower.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/22901333301.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/zofakavuzivifoxuvapuj.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/denidijivuxebaj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F1 5156 bytes
SHA-256: 4c2dfc734da209279397bf49fa78ba3cb8d5f0b33d861dc64a27e3a9ba656f01
font_01_sfnt_off0001426b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426B 14848 bytes
SHA-256: 0717b547952adeb879f548718d3ac5c580c265be80eabd8c6dc318e0cf98ab55