Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd56d3582b242c8…

MALICIOUS

PDF

77.8 KB Created: 2021-04-04 10:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 51ee63c227b5cab6d81480f67adcd04e SHA-1: e5947e6bec804ea016cbf516f24cc2a5112a34f7 SHA-256: 3dd56d3582b242c83045030262cc43ce049987c8f810f46a2266e0b4f3395e7f
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous external URIs pointing to various domains, many of which are hosted on disposable or suspicious platforms. The primary purpose appears to be directing users to external content, potentially for phishing or malware distribution, rather than providing legitimate information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://golowaki.ru/wix?keyword=doritos+chip+baby+commercial PDF link annotation
    • https://gafewabonir.weebly.com/uploads/1/3/2/6/132696171/veror_lafixune_telowitedab_wejupesozof.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/ia5hehi/king_female_soccer_player_protest.pdfIn PDF document text
    • https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/3139091.pdfIn PDF document text
    • https://mizefowoxeze.weebly.com/uploads/1/3/4/4/134485365/4530dfe8.pdfIn PDF document text
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/kivimed-wapajonamik-vameg.pdfIn PDF document text
    • https://dibumofum.weebly.com/uploads/1/3/5/3/135313591/6118426.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/diahiYt/92352990761.pdfIn PDF document text
    • http://vatemuredaxusob.22web.org/pwc_annual_report_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/rifebonapesi/PiiOz3P/pofowugefowobudelajoda.pdfIn PDF document text
    • http://zupejuxe.iblogger.org/luther_film_worksheet.pdfIn PDF document text
    • https://tifevijokob.weebly.com/uploads/1/3/5/3/135351552/juvok-bilotoj-valitobok.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/9141793.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/lkrBokr/drill_guide_ace_hardware.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ggijgji/diversity_and_inclusion_statement_academic_job_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jaetjeS/comedy_animation_movies_full_movies_english.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/el_ser_uno_arcanos_de_thoth.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pobiludorigogok.epizy.com/bohemian_rhapsody_notes_piano.pdfIn PDF document text
    • http://zemofebu.epizy.com/jidekalovomakivuvemafu.pdfIn PDF document text
    • http://kixatet.rf.gd/78305078897.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_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 5416 bytes
SHA-256: b554a93edab1e2cf71d95d4d2d87fff72ec68b67e40a665ab9eb7d507d2bf462
font_01_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 11860 bytes
SHA-256: dd845214d5a708531aecb77a85bdd6c422ff3bfb416ec2b930a5cb97043c1347

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