Malicious PDF — malware analysis report

Static analysis result for SHA-256 008157897a7a0b80…

MALICIOUS

PDF

62.5 KB Created: 2021-02-14 03:06:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3023c3a0abd3e21f3293de945fc60809 SHA-1: 70d6ace3d4b5d1763b62e8b86f167ea31630b4d2 SHA-256: 008157897a7a0b80b83daf55c7ba097b1de315812d5136e8315b002a339576fd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=before+watchmen+pdf+download PDF link annotation
    • https://loloxemevo.weebly.com/uploads/1/3/0/7/130739498/2533933.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/9267628.pdfIn PDF document text
    • http://coins24h.com/71692135126zx741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5fd9e74cf0b01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5fec847b8b5a6.pdfIn PDF document text
    • https://vokijovagugudis.weebly.com/uploads/1/3/0/7/130776016/4ed241c6b39ed.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/c7749bd3243.pdfIn PDF document text
    • https://kalogipewaga.weebly.com/uploads/1/3/4/5/134595512/bowivodo.pdfIn PDF document text
    • http://websporizlehd.com/fesozamodewawirotomovamap1pejr.pdfIn PDF document text
    • https://cdn.sqhk.co/naxibibu/bkdjh9a/wesamafurope.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/mivokozibu/14357776645.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/axe_io_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/vce_to_converter_online_tool_free.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/wow_legion_brewmaster_monk_guide.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_off0000b8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E0 5360 bytes
SHA-256: 445abfeab6ab997a2dc5321b2aff73ba63773bac915dba7d71db75abccefa0e6
font_01_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 9984 bytes
SHA-256: 3a29572d3182df44c435c4a245e537507a0dc87c8962bbb5ee5188cfbafe5d5c