Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f08da3e555c0d41…

MALICIOUS

PDF

73.1 KB Created: 2021-02-09 00:30:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 29f0d6968edcf13b86cd163fc3091edc SHA-1: 797f3ba58dae9804098445f4e2d4092dbd360c56 SHA-256: 4f08da3e555c0d41ea94f7b40dac010a4dc730a369c3174e365b3dea4858a519
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wb?keyword=aashiqui%202%20songs%20free%20%20hd%20videos In PDF document text
    • http://forpost-electrica.ru/livros_sobre_maonaria_gratisqz8ga.pdfIn PDF document text
    • http://wapotod.22web.org/interior_angles_of_polygons_worksheet.pdfIn PDF document text
    • http://b4shop.icu/savaxufvvm75.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/70452410634ojli0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xonitobilabi.rf.gd/definition_of_bronchial_asthma.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/civ_6_germany_guide_rise_and_fall.pdfIn PDF document text
    • http://jepisaf.epizy.com/kelvinator_inverter_manual.pdfIn PDF document text
    • http://dudasuz.epizy.com/jogagenaxugenojagogedev.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/21242407510.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/follow_up_meeting_notes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/40997283010.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/91059262627.pdfIn PDF document text
    • http://tigefaxoweta.rf.gd/96928910914.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/2400851809.pdfIn PDF document text
    • http://fipinajamidab.epizy.com/26417025028.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_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 5444 bytes
SHA-256: e7cf86ad587f0798d00ec4ae428329b080dd73503bb9ff0ad3c1a91460abf346
font_01_sfnt_off0000f512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF512 10260 bytes
SHA-256: 14c002db320bc11ee11c8be1c81425b475ec91e5078530648b366ba557020d91