Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b11a466c663c3ef…

MALICIOUS

PDF

67.0 KB Created: 2021-02-25 06:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ae8d4c9697b0cfd5d7f3a878cd500b24 SHA-1: b896de14a371f3d44c950e2c8e39147d1649e93e SHA-256: 7b11a466c663c3efbbd34f88b0520bcb411c2587889f3bc167258e43a1b78899
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://baarspo.ru/aws?utm_term=chapter+16+crossword+puzzle+answers+medical+terminology PDF link annotation
    • https://wajiwojoduposop.weebly.com/uploads/1/3/1/3/131379590/zajaxetabonenifo.pdfIn PDF document text
    • http://fitokapss.xyz/xuzivejaraxu9c857.pdfIn PDF document text
    • http://kapusta.pro/ccr5_and_cxcr4_full_formp7z2y.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/genedesowul/raxogijoxunotogo.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/angry_birds_rio_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/63238377043.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/kahoot_show_answers_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/blah_blah_blah_song_mr_jatt.pdfIn PDF document text
    • http://fijoramobizedej.epizy.com/sullivan_algebra_and_trigonometry_8th_edition_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/medical_emergency_procedures_in_the_workplace_template.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/82744541154.pdfIn PDF document text
    • http://bozalusi.epizy.com/93344236233.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/backsplash_sheets_for_kitchen.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/bikudunoroxuvalesulug.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/flying_tortoises_ielts_reading_answers.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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 5844 bytes
SHA-256: 55b58d53428b7944e055dfec5bc1d101aa83fc2a4368543f687a3655faa34b7a
font_01_sfnt_off0000dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 10188 bytes
SHA-256: a736c65895a34022de14163cd763a1db07ad0a8c1be0a036b9727aa637bd7348