Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ad2f9a2b5bc36e…

MALICIOUS

PDF

80.9 KB Created: 2021-02-28 07:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 29dc7472223fcf0e2da3b061a77ace31 SHA-1: 4dbf667c928ed7e11e623b74c9dd7488fad99feb SHA-256: c4ad2f9a2b5bc36e2edb2b98ec7b1cfe676bbd451a78a659c907b0ad5e2eb241
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or engage in SEO abuse. The primary URL, 'https://dugedepap.ru/award?keyword=java+programming+for+dummies', indicates a lure related to programming education, likely a phishing or scam attempt. No scripts were extracted from this sample.

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://dugedepap.ru/award?keyword=java+programming+for+dummies PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fe33054931dd.pdfIn PDF document text
    • https://balevogikuvapij.weebly.com/uploads/1/3/5/3/135333961/rusewegexok-zugifadozususa-ralawaboxine-jiwatomijivi.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/thomas_the_maze_runner_movie_cast.pdfIn PDF document text
    • https://vogopulopom.weebly.com/uploads/1/3/1/3/131398589/8513754.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5fe91b7d26edc.pdfIn PDF document text
    • https://xesisawizes.weebly.com/uploads/1/3/1/6/131606125/wuzejuz.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/does_snow_whitening_actually_work.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/661087.pdfIn PDF document text
    • https://xadatazibinul.weebly.com/uploads/1/3/1/4/131483053/tofipon.pdfIn PDF document text
    • https://poburazaz.weebly.com/uploads/1/3/5/9/135993358/mopebeti-xefikogugoni-xibibasovin.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/58122515995.pdfIn PDF document text
    • https://diwolusetu.weebly.com/uploads/1/3/5/2/135299278/1cbf1aa622a930.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/tijexifu_wamixox_sinuru_vowexapinaduri.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/3242996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_601a66ae5a048.pdfIn PDF document text
    • http://java67.comIfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/interest_groups_icivics_answers_the_potato_problem.pdfIn PDF document text
    • http://divimoxigorube.epizy.com/banarasi_babu_movie_song_video.pdfIn PDF document text
    • http://duginuj.rf.gd/velusefelarozojusi.pdfIn PDF document text
    • http://javarevisited.blogspot.comIn 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_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 5376 bytes
SHA-256: b2b77848d0223462042a0e40d71a5a562fa5ebdbc761cc36f6b0f0ee94ef4b46
font_01_sfnt_off000111a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A9 10720 bytes
SHA-256: 597363c7dd83bfb21cc2ad8eec648f33fc509607b497046ecc3ab68c86f176a5

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