Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce3604d724cb91d…

MALICIOUS

PDF

65.0 KB Created: 2020-11-18 22:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-09
MD5: 4d589581c31256c52aec3db09e31db0d SHA-1: ba0fbb23539a9e4b1d50cba319bbe52c8f3f0e5b SHA-256: 9ce3604d724cb91de2f80b8b608e2d4e23f5acfe425d199e81e9afdcd87a72d1
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://trafffe.ru/123?utm_term=microsoft+word+buttons+not+working+mac PDF link annotation
    • https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/73c83b6e18.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/matogapibelifiv/emotional_development_in_early_childhood.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/are_re_are_re_telugu_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/35745017038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b47f84-e4e4-4c52-83b2-c4adce5b57de/xovijiwugotof.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/85893117087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa41efd-d776-4e8c-a1da-2ffbfaeed44a/leopard_s_blood_christine_feehan_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/lion_king_cleveland_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/bachna_ae_haseeno_ming._com.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/adjacent_angles_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/sidunuduzenuve.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/how_to_reduce_belly_fat_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/silokipi.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/bulolufinedasifenowujo.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/kepalosuketage.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_off0000c128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC128 5608 bytes
SHA-256: 99ea68e972387416af6ace74528a513d02150a9733950eca6368831d0be46cd1
font_01_sfnt_off0000d44a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44A 10264 bytes
SHA-256: 6eed7597fd838139f8ba1371d49dcf0799a7726e8a9dc55c8708c471a9c87585

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