Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf30828d5e17bb7…

MALICIOUS

PDF

70.4 KB Created: 2021-02-09 23:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 544b9f4067d94144041ab91551ca9718 SHA-1: 587a06bedff82ca5f3c8b8ef5fdfa8cffcc90165 SHA-256: baf30828d5e17bb7c8282d5c2cc93d323b3ece848939e88a7dc98dbc2d78ee13
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/aws?utm_term=valkyrie+crusade+awakening+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373304/normal_5ffcefd0228ab.pdfIn PDF document text
    • http://keep-travel.com/fesifebm5kj.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/daxikowaf.pdfIn PDF document text
    • http://nashremont.site/music_video_20193nmj8.pdfIn PDF document text
    • https://xisulufi.weebly.com/uploads/1/3/4/8/134870666/5802796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464529/normal_601cf8548749b.pdfIn PDF document text
    • https://xewezepi.weebly.com/uploads/1/3/0/8/130813550/fewutuvinalezafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_60048dbe9ef7b.pdfIn PDF document text
    • http://eglo.club/teora_musical_y_armona_moderna_vol._i6z3ec.pdfIn PDF document text
    • http://halfraire.xyz/pibejegitovebuxizejerale72h.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/vososasoxumete/ninibanulurerusonufetajer.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/animal_farm_themes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/rujune.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/windows_10_update_terbaru_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/selena_gomez_songs_free.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_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 5332 bytes
SHA-256: ac0d580c9aac75db522bc67fef388bdaf4be15aecd4b292f8c7c51d90fddee85
font_01_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 10816 bytes
SHA-256: f943f44214560d4a93cc8423b6f2cd89d07ca3fb921325ede428179d465e59d8

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