Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd80bc0e9a867e1…

MALICIOUS

PDF

77.0 KB Created: 2021-05-16 18:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ccb9fe92f17b3ca3fe6aff63bba3126e SHA-1: 05379938e4a9e289ca4d1c1fe569b5f0ba294935 SHA-256: 4fd80bc0e9a867e1a4fe5d35f948c7f08ed9a6693e2e7c0ba2dcc116a1b32daa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to downloading drivers, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=acer+lcd+monitor+t232hl+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421038/normal_602f2ba98bc38.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/what_can_i_make_with_an_air_fryer.pdfIn PDF document text
    • http://datingdate.site/sbs_2011_standard_vpn_setup49fq7.pdfIn PDF document text
    • http://delozofize.scienceontheweb.net/blackthorn_key_book_1.pdfIn PDF document text
    • http://crubr.space/tipovivuxafu2nnap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426697/normal_605ace84855fd.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/7377352224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fcac8eaea070.pdfIn PDF document text
    • http://hotsales-com.xyz/36434267381ytnai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454161/normal_5fdf8545b8567.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/71299296776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470688/normal_6024ed2fbe576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5fd826abd4d71.pdfIn PDF document text
    • http://blockhcain.host/wooldridge_introductory_econometrics_a_modern_approach_solutionsutxfe.pdfIn PDF document text
    • http://copyright-infringement.business/crash_fever_reroll_guide_androidkacib.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/the_duchess_of_malfi_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf606a1-3370-4a84-85bf-d89e672730a6/78460787638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2546cce5-c6ee-46f9-bfd0-45df3d2408a9/fender_frontman_15g_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936b3171-815e-4fbe-b40d-6fdde7d3146c/wafumotawogotiwosaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/211dfa43-4387-4ec1-98d4-96a668ab4639/xuwejusiwix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c8f56f-f5f7-4a9d-9ea3-90943f2a6bad/bidibovabinu.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_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 5136 bytes
SHA-256: c0684ebd90a29c1e10bb5aeac1bf428d86bf4137f0883a38fbcaea3dd467d539
font_01_sfnt_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 11688 bytes
SHA-256: d735910f4172dda819e90d27c711ddc27aba099c53061a578423aadb455275ce

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