Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54f640953e6af9d…

MALICIOUS

PDF

72.0 KB Created: 2021-02-12 16:32:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 67eb70f3b57c014e43aac52b67ee0106 SHA-1: af1018117705d5827cb6ba7f3774ae4430152677 SHA-256: a54f640953e6af9dc95216c5fe20b9c15f4a92357f2c4f1416c45307ca089537
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://maypoin.ru/123?utm_term=hot+dog+bed+for+humans PDF link annotation
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/sajatur.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/eAfkPij/elton_john_your_song_listen.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/ighBxjb/fejuziwevuditudibukiwiba.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/fggHZoK/2506411381.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/NjgRhgr/safopuziwululilamuwa.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/ieaMdja/racing_fever_game_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/rgdmUa2/tropico_5_ps4_money_cheat.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/8125031.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/35216e0751f.pdfIn PDF document text
    • https://jomupalekiloja.weebly.com/uploads/1/3/4/3/134310494/b2c3d4728.pdfIn PDF document text
    • https://cdn.sqhk.co/zefipuvuwifi/TCu9Thh/craftex_spindle_sander.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/hJK7Lgj/48244962880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazoluno.epizy.com/tizitorawawamobiza.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/nepidexelesafaxurusuli.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/67520588591.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_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 5388 bytes
SHA-256: 7b0b3cb2e09b3e579ce5d057d9ade392fbffdc333c20e0d36d4b755afc4bbd41
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 11084 bytes
SHA-256: 9392b16749a745c8b17381beaaedc215eebfa50117aaa9e93ab820da0c89e239