Malicious PDF — malware analysis report

Static analysis result for SHA-256 4093cfba822cb5f9…

MALICIOUS

PDF

73.2 KB Created: 2021-02-26 03:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0a1eb61eeb7ddda4ff675f8fb53e560e SHA-1: 88d92cd612b9fcf67c44dc6fc64919360c8609ca SHA-256: 4093cfba822cb5f9bac1840dc42b5bc8d273da79f34617e2cad620f7d7450616
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=polaroid+intel+inside+tablet+charger PDF link annotation
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/pomulevi.pdfIn PDF document text
    • http://lorowivo.22web.org/56939662224.pdfIn PDF document text
    • http://wowivawod.iblogger.org/42886295206.pdfIn PDF document text
    • https://koxabiwepa.weebly.com/uploads/1/3/4/3/134309970/3175461.pdfIn PDF document text
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/mixipomab-jadimevuguze-damedesewu.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/megelugik/bipuvapodepoxosijamez.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/types_of_sentences_worksheet_grade_10.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/63503246790.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/mijinawatoju.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/can_you_keep_a_secret_japanese_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/41906315965.pdfIn PDF document text
    • http://fesenobonirizu.epizy.com/18382211830.pdfIn PDF document text
    • http://ximawefab.epizy.com/facebook_profile_status.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/black_nebraska_uniforms.pdfIn PDF document text
    • http://sopazanit.rf.gd/fundamentals_of_engineering_thermodynamics_9th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/hilton_onq_api.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/kadekomizamilej.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_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 5340 bytes
SHA-256: c213447ebd2f8e8522fdcb0b1c960e490857a2d682678eb25aa3054fa000c878
font_01_sfnt_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 10360 bytes
SHA-256: 82bfbd5659c4206a3562b1b60c7c21274e340122ecca76921878e496ffed18d3