Malicious PDF — malware analysis report

Static analysis result for SHA-256 952d78d8e654be2c…

MALICIOUS

PDF

71.8 KB Created: 2021-06-04 20:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd65e4bd78631e7a6f83c1b3010dddfc SHA-1: 86fa7b0d5b91bb022e807b04db5484bf0499d6a3 SHA-256: 952d78d8e654be2ccc1448331085190cf92d3fb6cd341c9ee1cb62536f257adb
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/pbw?utm_term=how+to+hack+simcity+buildit+2020+ios PDF link annotation
    • https://wabalunizuwa.weebly.com/uploads/1/3/4/6/134643533/lezaxugol.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/vejuj.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/1016865.pdfIn PDF document text
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/dododovuxetov.pdfIn PDF document text
    • https://nubiduxabegi.weebly.com/uploads/1/3/1/8/131871606/c7f63b3052.pdfIn PDF document text
    • https://lisebozaran.weebly.com/uploads/1/3/4/6/134694889/rojital-vinim.pdfIn PDF document text
    • https://buvesedivuros.weebly.com/uploads/1/3/5/3/135398108/jimolijerebo_xirasobakavepob_wibaxubel.pdfIn PDF document text
    • https://fupiloxeti.weebly.com/uploads/1/3/4/3/134380404/bunujitexa-mujigunijexex.pdfIn PDF document text
    • https://rujedupexiveviz.weebly.com/uploads/1/3/4/8/134874221/3326878.pdfIn PDF document text
    • https://bavarijuni.weebly.com/uploads/1/3/7/5/137503587/kepituwij.pdfIn PDF document text
    • https://lafotavesa.weebly.com/uploads/1/3/4/6/134633764/kobimig_fudenima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegoxelaw.pbworks.com/f/how_to_fill_account_payee_cheque_of_sbi.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/w/file/fetch/144450819/oh_lord_my_redeemer_sheet_music_free.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144459123/bewefik.pdfIn PDF document text
    • http://sajateves.pbworks.com/f/9778443270.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144613620/dipiziz.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/roblox_mod_menu_unlimited_robux_pc.pdfIn PDF document text
    • http://dipazuwawex.pbworks.com/f/how_to_check_defrost_sensor.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/57194845215.pdfIn PDF document text
    • http://noxiwako.pbworks.com/f/planning_poker_cards_download.pdfIn PDF document text
    • http://pefumugat.pbworks.com/w/file/fetch/144541296/fepizagirigofefadufuxutif.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_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 5716 bytes
SHA-256: 309029e833b4fbf8847f8bf63c61b7cb07e1e2a5e41cac301b460dfbaf7a10b6
font_01_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 11540 bytes
SHA-256: d486d61d498b1c3fe7bc762509f8d0e96826c7c152a3b055b3a8b9521b2c37a6