Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36bec17c0e7369a…

MALICIOUS

PDF

69.4 KB Created: 2021-02-06 16:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 40f0432be8e443bc1d7d502c53090ed1 SHA-1: e33314b3068ff9d8e1ce44902301eba67d1c1a51 SHA-256: f36bec17c0e7369a44fdb96ed4b1abfdf64d18572b25cfa9cf3acbda001d2501
196 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
  • 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://bologen.ru/shook?utm_term=merge+block+dice+puzzle+mod+apk PDF link annotation
    • http://calipshatngaccs1.xyz/vice_news_co_foundermapv6.pdfIn PDF document text
    • http://medway24.com/gelikeruzizarofubukifoddre7.pdfIn PDF document text
    • http://eferevole.com/7964959583aqu0b.pdfIn PDF document text
    • http://it50save.info/annabelle_creation_full_movie_freeauqro.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/pisiwuwebanaferikiw.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/cuantas_varillas_se_necesitan_por_metro_cuadrado11rja.pdfIn PDF document text
    • http://samaraexpo.com/jukuzitisatuzx8dfp.pdfIn PDF document text
    • http://livecopyrightverification.com/23849620069g67dh.pdfIn PDF document text
    • http://copyrighytsupport.com/kaferinolawokuzakawa09859.pdfIn PDF document text
    • http://crubr.space/wixofopufovulamuwiwadevufg6vkt.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/lezopobigeza/tolibi.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/29512704068.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/nuvufakepuziraxejozi.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/82195616148.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/reservation_cancellation_letter_format.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_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 5472 bytes
SHA-256: d4a4fe40996235c5d9a4cc146dcdc794a783d83f5719fbe058d2b09196fabf61
font_01_sfnt_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 10984 bytes
SHA-256: a58f5794f1c428d7ad4b533f4c7ec5fea04ffb1451b60279820fa4b670044924