Malicious PDF — malware analysis report

Static analysis result for SHA-256 f675b143ad49fbcc…

MALICIOUS

PDF

81.7 KB Created: 2021-03-31 20:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1eafe061ac5adceb40c352699152c403 SHA-1: 13ec5131fd6f6c00ec79211b02d71303cdfece97 SHA-256: f675b143ad49fbcc7c8efa5d3bb20731b9dc0ec19be9de92a894a5692f810df5
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external URLs pointing to various PDF documents. The primary URL, 'https://seumenha.ru/strik?utm_term=how+do+i+unblock+a+number+on+my+vtech+cordless+phone', suggests a lure related to common search queries. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the extensive use of external links is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/strik?utm_term=how+do+i+unblock+a+number+on+my+vtech+cordless+phone PDF link annotation
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/sozewaxefesu.pdfIn PDF document text
    • https://darefosal.weebly.com/uploads/1/3/4/6/134601331/41c21096e351111.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/uUvhfgh/zirivudoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/duxisabaza/jikhgyw/cover_page_template_chicago_style.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/ighjd4D/hill_climb_racing_2._3._6_apk_download.pdfIn PDF document text
    • https://zetitazafoxiz.weebly.com/uploads/1/3/4/0/134040412/9637514.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/NqYijja/94600591366.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413474/normal_5ffa3be7403d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490376/normal_604867bd62992.pdfIn PDF document text
    • https://cdn.sqhk.co/geruvijiwiw/Jjgoger/chicago_manual_of_style_cover_sheet.pdfIn PDF document text
    • https://timodidub.weebly.com/uploads/1/3/1/3/131379596/9398777.pdfIn PDF document text
    • https://cdn.sqhk.co/wozobifanu/CWieyCy/kupokigunejunelog.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/nidjeji/57027491229.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/ZPojfDs/63183963344.pdfIn PDF document text
    • https://tinuvireredat.weebly.com/uploads/1/3/4/8/134864568/zoriwokevexanil.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/9jclihi/7511128286.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/0463be76-f06f-4afb-80b1-29db706743df/maya_angelou_quotes_still_i_rise.pdfIn PDF document text
    • http://fifonuvis.epizy.com/11007631651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a9dc54-3198-4a99-b4d2-6a30916455c7/60668595523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a668ef-97d5-4d9e-9b7d-38b70fe18e1a/57401625599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb11cb0-fb3d-48f3-80d7-1ac2e92c10bd/edge_of_empire_dice_app.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/calendar_template_september_2018.pdfIn PDF document text
    • http://karelovaluz.epizy.com/hive_insect_crossword_answers.pdfIn PDF document text
    • http://rurodebijusidof.epizy.com/up_b._ed_syllabus_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58eb1d6-6c1f-4aef-b715-b379429eec53/baby_g_shock_watches_black_and_pink.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_off00010117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 5732 bytes
SHA-256: d9fb7184732eaad4b769e20a42563011f7785124e8cb001af3ec4a3326fe64a5
font_01_sfnt_off0001147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 10752 bytes
SHA-256: b5754da9a8f9faa39debf98220e2a7b94a5c5efc95d2d3044635d98db384192b

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