Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af4382a39c3ca11…

MALICIOUS

PDF

80.2 KB Created: 2021-05-14 13:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 025b7ea373f91789f28ee3411cae7f81 SHA-1: d7dae79b9ee8803c7866cfb6f0166b0132676e19 SHA-256: 5af4382a39c3ca11b5f17b29ae240c803da263fe801286cdd01113dd07faa2a0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, with a primary focus on SEO spam or phishing lures, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=what%20is%20a%20orpheus
    • http://wabuxon.iblogger.org/kiddo_meme_template.pdf
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/f0855b0.pdf
    • https://cdn.sqhk.co/ralapogifur/HjjSSie/bingo_cards_generator_excel.pdf
    • https://cdn.sqhk.co/kisesawaropo/jjJhbgd/super_dancer_2020_finalist.pdf
    • https://cdn.sqhk.co/wekonexiw/vjhLhh3/how_to_write_a_business_proposal_letter.pdf
    • http://jexemukanofefoj.iblogger.org/bbc_news_video_song.pdf
    • https://pebewaviwukak.weebly.com/uploads/1/3/4/4/134463457/fenedobat.pdf
    • http://tuwukadinem.mygamesonline.org/57766755560.pdf
    • https://cdn.sqhk.co/lowixadoges/GKjfDhg/temakuno.pdf
    • http://xovuwowim.mypressonline.com/objections_jeb_blount.pdf
    • https://xabejopoturidu.weebly.com/uploads/1/3/4/3/134352457/b26c4f15.pdf
    • http://joxitikoki.getenjoyment.net/92213029459.pdf
    • https://cdn.sqhk.co/lululitoj/96whdhg/dog_balloon_animal_instructions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fujifumava.epizy.com/zaful_swimsuit_size_guide.pdf
    • https://s3.amazonaws.com/dikomavomem/critical_thinking_questions_and_answers_for_interview.pdf
    • https://s3.amazonaws.com/ximupuv/29200986255.pdf
    • http://kofipazefoleris.epizy.com/97550260807.pdf
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_c48cfa874d944f91bddcc198d77f7bed.pdf?index=true
    • http://mibofive.epizy.com/bevenatemav.pdf
    • https://6ae5a9c1-8526-45f7-b068-03ddf2465b28.filesusr.com/ugd/87f732_461d412d0ea443838ad659d81fb82747.pdf?index=true
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_2fa9e1b104304c4fad1a648de61f803b.pdf?index=true
    • http://pudolajuji.atwebpages.com/the_bible_old_and_new_testaments_king_james_version.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_off0000ec0d.bin
d6982dcf99561047f25e910d2088b204dc4d93134b96f80fd6cfba71afa48a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0D 4664 bytes
font_01_sfnt_off0000fc06.bin
4c942e55046aa654699d8d2d66670b1e65efb0320da67ece397952ca4389e31f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC06 12252 bytes
font_02_sfnt_off00012517.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12517 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.