Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11300e18fe6a55e…

MALICIOUS

PDF

75.0 KB Created: 2021-04-03 15:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c9fea9d61054d2760cdf262b17577d9 SHA-1: b5bbe941424ad8c8cb2813272df9822089f24df7 SHA-256: f11300e18fe6a55e778087ab3788e829cd9dc0c48a182a0dbd0350efaef5b7ab
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/aws?utm_term=stihl+ms+180+maintenance PDF link annotation
    • http://turoxolu.iblogger.org/87913654953.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/nugisoginunozabezuker.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/cja6KGn/98713887915.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/engineering_company_portfolio.pdfIn PDF document text
    • https://cdn.sqhk.co/vasozaponem/bji1wgd/figiwuwomexisazumoj.pdfIn PDF document text
    • http://josowivofowog.iblogger.org/architect_portfolio_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/dumudegurit/iDicgd2/28641032698.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/what_are_examples_of_positive_thinking.pdfIn PDF document text
    • http://zewojapu.22web.org/assistant_chef_de_projet_informatique_alternance.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/hibhaVI/macaw_bird_life_expectancy.pdfIn PDF document text
    • https://cdn.sqhk.co/gatutojuse/igeyif6/congenital_facial_deformity_syndromes.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/Qjiklq9/mineral_oil_laxative_walmart.pdfIn PDF document text
    • http://suwefazimim.medianewsonline.com/66146474278.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/gijPfTU/aqualife_3d_tips.pdfIn PDF document text
    • http://povusafurezo.iblogger.org/jisukeverel.pdfIn PDF document text
    • https://cdn.sqhk.co/kisibijobu/RZgi1jj/kojoguzojudu.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/iapgjgh/25856842510.pdfIn PDF document text
    • http://solasaxutegi.iblogger.org/presupuesto_de_capital_libro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesawebibu.rf.gd/sakofotizamowiratapope.pdfIn PDF document text
    • http://mubizutoperix.rf.gd/faulkner_the_bear_summary.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/67078098470.pdfIn PDF document text
    • http://popomajuvuj.rf.gd/bed_sheet_folding_hack.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/mofinatugapidufenudadele.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/envelope_template_vector_free.pdfIn PDF document text
    • http://xokeraje.rf.gd/xubufegojudapute.pdfIn PDF document text
    • http://wezinetukuxemim.rf.gd/woodworking_basics_crossword_puzzle_answers.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_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 5432 bytes
SHA-256: 887145af98bf6f4e34e7286dafa019d25d0f718d6ed7ba82ac6174d534afaa8c
font_01_sfnt_off0000f7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A3 11452 bytes
SHA-256: a6cb4fd0b5c5bf0e9021dfdcd8b4a414f8419cd0a443d16cef5044af58ad05d0

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