Malicious PDF — malware analysis report

Static analysis result for SHA-256 738836bda5b0b526…

MALICIOUS

PDF

183.5 KB Created: 2021-03-25 02:10:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aca327d8043a8bbd13e6ce655ec13df4 SHA-1: 290e2802c30c1b36ddea6f175e6d0566e2ee6707 SHA-256: 738836bda5b0b5260d8f27b90af6766da09c7bd7ba891c5acd9d24ab8fcb11eb
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/strik?utm_term=85503+liftmaster+price PDF link annotation
    • http://fb-copyright-help-from.com/el_vendedor_mas_grande_del_mundoi0dma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6032c5df89932.pdfIn PDF document text
    • http://gedawirij.66ghz.com/faxukazixevufaxekaxenewut.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/thcgiTj/31543581390.pdfIn PDF document text
    • http://alcexpress3.xyz/87607895868wze96.pdfIn PDF document text
    • http://damita.fun/wanepasejafitawilinekiguqje15.pdfIn PDF document text
    • http://gnfcns.info/dolewegesewape2xqh.pdfIn PDF document text
    • http://dithetsen.xyz/55410788459clgic.pdfIn PDF document text
    • https://cdn.sqhk.co/puwonereb/hfhjan6/87152842488.pdfIn PDF document text
    • http://thailandlove.site/what_watch_does_nadal_wear_on_courtwce6o.pdfIn PDF document text
    • http://adminhalil.com/23486422476rck6j.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/jME0jdN/love_letter_for_him_on_first_anniversary.pdfIn PDF document text
    • http://snt-br.ru/fomodidawakimoxugutuwotiwe0j0.pdfIn PDF document text
    • http://savadaqwe.space/how_to_draw_multi_storey_building_in_revitdkagx.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/hh9gc5X/118125876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_6015b9d38c4bd.pdfIn PDF document text
    • https://cdn.sqhk.co/kilalovuge/sgjZLT5/83333904333.pdfIn PDF document text
    • http://1xbet-football.fun/does_dollar_general_sell_dog_clothestd1b1.pdfIn PDF document text
    • http://sozetil.66ghz.com/free_easy_violin_sheet_music.pdfIn PDF document text
    • http://carluxepaint.site/lajinisavikomeuoxl4.pdfIn PDF document text
    • http://stavki.link/gekomokafgslrz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_604493097eff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_6018a0fccee00.pdfIn PDF document text
    • http://strgb2.ru/apache_jmeter_2._11_freewui5r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajoxutevo.epizy.com/suxugafupula.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B14 5688 bytes
SHA-256: 4c10328f0e63091e9bdb186fdbb2260b3314a434432c95110985ae62ecf3c2ff
font_01_sfnt_off00027e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E53 4360 bytes
SHA-256: e7a5a22e7e30374b01b635e1dd1b8c555f54ded5aecbb5c8cc19d137692ae49f
font_02_sfnt_off00028eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EB7 12060 bytes
SHA-256: 965c058b473a57eef654f720d4fb46c7c508dfe54203a9637ed45358879a4fc5
font_03_sfnt_off0002b763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B763 16984 bytes
SHA-256: 7679638656df57a3293c3d80170aa9e52f26c853d676dcbb99e32fa69118f80d