Malicious PDF — malware analysis report

Static analysis result for SHA-256 67103116f8bbc0f5…

MALICIOUS

PDF

75.4 KB Created: 2021-03-01 21:52:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1f332395ac7cae044cadea1edcb9b1a5 SHA-1: 61832ac8685571201749c7e076cd365f29b37d2e SHA-256: 67103116f8bbc0f5db90632beeec39fa8d307845177b8b3d661ad80c83bc0b85
196 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
  • 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://leonvi.ru/123?utm_term=reddit+security+analysis+letters PDF link annotation
    • https://wuduzavuvavazi.weebly.com/uploads/1/3/4/6/134618101/55587.pdfIn PDF document text
    • http://winnerslm.space/867688558729sk2n.pdfIn PDF document text
    • https://cdn.sqhk.co/pasezateda/ih3bXgf/boo_at_the_zoo_cleveland_ga.pdfIn PDF document text
    • http://cardio-active.site/edelweiss_guitar_chordsv9idx.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/falevi/hplc_agilent_1260_infinity_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tugafebip/choices_stories_you_play_apk_mod.pdfIn PDF document text
    • http://jipowefata.epizy.com/video_arsenal_vs_liverpool.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/snapchat_streak_lost_template.pdfIn PDF document text
    • http://robefopatobut.epizy.com/permutations_and_combinations_calculator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/65218550543.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/numazuzobazujixozoze.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/48737514725.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/ketuwivirawogalutatonog.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/telugu_janapada_geethalu_songs_naa.pdfIn PDF document text
    • http://sipopos.epizy.com/hotpoint_8kg_condenser_tumble_dryer_manual.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_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 5040 bytes
SHA-256: 9780468f3533884f6f3c44b1fc2b1834c1dec130a8d3153b14bcc96f531bbfbe
font_01_sfnt_off0000fb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 11112 bytes
SHA-256: 6790c065c9ee997b63f911a241f3dbf67f8ccc53d28383da8001a06ad1b43fe5