Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10ce0f684ab32ac…

MALICIOUS

PDF

76.9 KB Created: 2021-02-15 23:20:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 24040af38929e2514f604cd411bb8610 SHA-1: 51512c08ebb397db832575792ac84ff527d31fc8 SHA-256: f10ce0f684ab32ac20157c10a4c7a07f1f176917ea1c183bcf63101b8a6721ea
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, suggesting a link farm or phishing attempt. The primary URL, 'https://maypoin.ru/strik?utm_term=how+to+set+time+on+casio+radio+controlled+watch', is presented as a search result, likely a lure for users seeking information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+to+set+time+on+casio+radio+controlled+watch PDF link annotation
    • https://cdn.sqhk.co/noperizapewo/cLx703q/greatest_songs_of_the_50s_and_60s.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/ifgfIjg/5156592561.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/31Ooo9r/monkey_mania_bankstown_groupon.pdfIn PDF document text
    • http://rotixumuzu.22web.org/baretumopefafolabamazodet.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/cziedKL/26825121732.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/XifQhiX/woody_blocks_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/jSBjghN/24168752006.pdfIn PDF document text
    • http://xusibuvuzos.22web.org/beck_online_app_android.pdfIn PDF document text
    • https://nejavolezi.weebly.com/uploads/1/3/4/0/134017816/lorixejatologegon.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/gjgorjG/vikings_season_3_episode_1_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/zarifabidit/hjiuKif/90s_band_t_shirts_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukusa/73365927592.pdfIn PDF document text
    • http://malakevuxe.epizy.com/filavikok.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/thank_you_for_meeting_email_template.pdfIn PDF document text
    • http://badiwiv.epizy.com/womut.pdfIn PDF document text
    • http://waruzav.epizy.com/vuxojib.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_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5232 bytes
SHA-256: 87a3699ffaf2615c899b427bb5111c83544c23a442397d4a9cdcb2beb88290a8
font_01_sfnt_off0001022b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022B 10564 bytes
SHA-256: fb0c356ef43bc6af628b927b0bfea29351e9342fe79362397d6d4f406b0a4262

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