Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5951e9471ec3d37…

MALICIOUS

PDF

72.5 KB Created: 2021-02-19 09:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: aed2ce00b91ed99801a04f8f2b4341c6 SHA-1: abd10a0a2f71fbd2dba488156108bd7628e67744 SHA-256: b5951e9471ec3d3745d3252184793cb0b60a984e28e7456fa082c877c18de969
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=what%20is%203rd%20shift%20hours In PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/e900e1d89.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/3001074.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/tabufa-kulixi.pdfIn PDF document text
    • http://smartcreditcheck.info/tezavorawejogowvlgqj.pdfIn PDF document text
    • http://jisotevujemi.22web.org/formato_cedula_venezolana_para_falsificar.pdfIn PDF document text
    • http://0fruits.space/mogejufuviledubebifezelipbhv0o.pdfIn PDF document text
    • http://favanitum.iblogger.org/5476762791.pdfIn PDF document text
    • http://begokawepene.22web.org/workers_compensation_ontario_reconciliation_form.pdfIn PDF document text
    • https://wovukevaz.weebly.com/uploads/1/3/4/5/134523328/153364.pdfIn PDF document text
    • http://opt05.ru/jko_combating_trafficking_in_persons_pretest_answersumaz4.pdfIn PDF document text
    • http://betomererag.iblogger.org/71966972872.pdfIn PDF document text
    • http://gatorama.fun/98019914269julbq.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/purufiz/hollywood_reporter_actors_roundtable_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/audio_song_shukriya_pakistan.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/gisixopa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/free_christmas_party_invitation_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/dinibufudebajitijesaxugus.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/the_ordinary_retinol_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_off0000e1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E3 5140 bytes
SHA-256: 9fc7a473127eb4ce9938ffaf2d9d73d6815c6f7dd372bff1db7b4a2cedb25dd4
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 9948 bytes
SHA-256: 1750a6d412efc72dcbddfb36cbe0f99b0cbc892114e70763167c971f2259ebad