Malicious PDF — malware analysis report

Static analysis result for SHA-256 80aed6b67596d6f0…

MALICIOUS

PDF

90.3 KB Created: 2021-03-14 11:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad0f9272e0bb152fd5bb8aa15940bc59 SHA-1: b54ca21bce50246dbf070d7157fda63dbd86b83f SHA-256: 80aed6b67596d6f0a7f1431b600ac7029eea0bdbbb33870677e8578259f4912f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous embedded URLs, with one prominent URL pointing to 'kuzutuzo.ru', suggesting a lure to a malicious website. The document body, though heavily obfuscated, appears to be a placeholder or decoy related to finance topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/award?keyword=public+finance+vs+private+finance+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4427538/normal_5ffabd2d8a39d.pdfIn PDF document text
    • http://samotimijo.22web.org/how_to_fix_epson_printer_not_printing_black_ink.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/napamamevatul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370746/normal_5fc63aa89e7f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5ff6363bdc319.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/what_type_of_oil_does_a_chevy_traverse_use.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_5ffa267884446.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/nupisemapezigu.pdfIn PDF document text
    • http://kajipim.mypressonline.com/first_ten_cube_numbers.pdfIn PDF document text
    • http://fenelixerekota.iblogger.org/26693123492.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_5fe8f84e96990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_29a66cbc671049cda704715da6580a83.pdf?index=trueIn PDF document text
    • http://tiwosutodegadax.onlinewebshop.net/how_much_do_automotive_engineers_make.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/xasimewixotiwilinebiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/7326536955.pdfIn PDF document text
    • http://datatoxozapi.epizy.com/ppt_on_cryogenic_engine.pdfIn PDF document text
    • http://kakedujeruvos.epizy.com/aparichitudu_full_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/business_card_design_book.pdfIn PDF document text
    • http://famefikapipu.epizy.com/93932666477.pdfIn PDF document text
    • http://kudogal.rf.gd/shakira_try_everything_mp4.pdfIn PDF document text
    • http://kesugoda.rf.gd/pete_buttigieg_campaign_platform.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_822e83a5cc5f4809b98a04bbdf93a0f4.pdf?index=trueIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_c9a3747a6fb942cf93bfa57df3dd3153.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 5124 bytes
SHA-256: 91294fd3418c3c3ea1ec45503b2721f3b526178ee840b0df55ac083bb9ae119e
font_01_sfnt_off00012636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12636 11268 bytes
SHA-256: 58ce4857b95b80f2efd4f7d7092ab84cd417e9c257da941898514e7eab6e3f3c
font_02_sfnt_off00014c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C06 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3