Malicious PDF — malware analysis report

Static analysis result for SHA-256 73928c35e0d8ff95…

MALICIOUS

PDF

66.8 KB Created: 2021-02-15 18:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a47c0a20394717a4027fc9568ef2f220 SHA-1: e624d973702a636fd4d6826ef63b1d941321443d SHA-256: 73928c35e0d8ff95a53182369dd9012acb825935195379c52e04990349ad5d48
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=sole%20treadmill%20repair%20service%20near%20me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_60223dac5aedc.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/fEvifge/play_dice_game_10000_online_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fe0bfe8da5e3.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/1623641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450158/normal_5feaeba0d543d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_600e089b803a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_600fc07bcaf61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fd805b791e7a.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/whdVvif/28270897550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_600ccab715752.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/hedgiif/sega_pocket_club_manager_offline.pdfIn PDF document text
    • https://mopirolelawa.weebly.com/uploads/1/3/4/0/134012876/66e0f2.pdfIn PDF document text
    • http://xuvivok.22web.org/50316269321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legekiwogitevil.epizy.com/gafafakefejavade.pdfIn PDF document text
    • http://fokogijisigife.epizy.com/b._e._d_remix_song.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/55623738981.pdfIn PDF document text
    • http://newewixojarulup.epizy.com/krgv_weather_report.pdfIn PDF document text
    • http://katanitape.rf.gd/angola_business_visa_application_form.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_off0000c92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92D 5380 bytes
SHA-256: 8a18f12b9933cfe348278ca159c4ca403eda89bc337a056f3c06dfd122f02f97
font_01_sfnt_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 10112 bytes
SHA-256: e4508fa52fd27713146ca5f85c3ff3e635fb7349aed5e967c6c508efbe2450cc

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