Malicious PDF — malware analysis report

Static analysis result for SHA-256 1192fe6102b6ebbf…

MALICIOUS

PDF

97.1 KB Created: 2021-04-22 20:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1df0c7c6f475c3ddaed6e8cf62f1ce82 SHA-1: c01373df0fe7914ed8e1caaf18c62c40fcfbabb2 SHA-256: 1192fe6102b6ebbf8d4add04925872985161703219f7ba70609cf854c438bf95
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing lure, indicated by the presence of numerous external links, many of which are SEO-redirectors. The primary URL, 'https://jacksth.ru/strik?utm_term=how+much+do+lowes+cashiers+make+in+ohio', suggests a deceptive attempt to attract users with search-related queries. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead users to scam or malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/strik?utm_term=how+much+do+lowes+cashiers+make+in+ohio PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fd676c242c86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_60263fad4e13d.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/Wtmjfhb/2252678047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402267/normal_6002ab381c80d.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/OHjfjgv/xokojiwizibedo.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/fijpjcc/mad_truck_hill_climb_racing_apk_download.pdfIn PDF document text
    • https://jarovoxo.weebly.com/uploads/1/3/4/5/134511136/1636104.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/jggj7sY/naxaruxakilozoludizawibak.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/jbideQb/rc-_airsim_rc_model_plane_sim_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/hgucja3/64401372577.pdfIn PDF document text
    • https://cdn.sqhk.co/zimidenex/fjjhaja/461036162.pdfIn PDF document text
    • https://cdn.sqhk.co/raxedaninaso/bgdjiBh/miwiwusepemidagi.pdfIn PDF document text
    • https://wipusometava.weebly.com/uploads/1/3/4/8/134846349/7315650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_5fd95b7353eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_60639f266ebc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383579/normal_60039b3bcb82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_602f620171311.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_6000a08c9672d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420014/normal_600b131cac5b4.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/wigvhhZ/puvozodel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA2 5296 bytes
SHA-256: e0697cb4ca3998b6db429e70330ef69832fd3897c680ba35cbfb80aa3bb99560
font_01_sfnt_off00014e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E85 11992 bytes
SHA-256: 5e6c8b99e284a50eb473d16d0a134c4e990abb3ec4b694523ce1e0acd20b3b70