Malicious PDF — malware analysis report

Static analysis result for SHA-256 8493321bc6192701…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 08:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 435cf1f42e7f6c293d64f64fa90ccd30 SHA-1: 5cf9e0d41a581e3cdf3d8df4f7679307013c9cb1 SHA-256: 8493321bc61927019b176645536bacb6d24e96c893089d205af57021ee1a3c14
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fokemale.ru/wix?keyword=angle+proof+worksheet+%25231+answer+key PDF link annotation
    • https://cdn.sqhk.co/vuvupewog/dbRaDjh/pevonogezexinerafofarozi.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/hegjjeY/86040594443.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/fipipagefurojogajesen.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/are_oakley_boots_authorized_in_the_army.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/93217143725.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/ganubatebedoxez/samofi.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/full_hd_bollywood_songs_2019.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_5298c62493ea41389c3a26720ae42a57.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/72402125221.pdfIn PDF document text
    • https://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_63455eb0f24a485cb07a9ef10e492052.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/cat_in_the_hat_quotes_be_who_you_are.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/zotunon.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/10954117499.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/95692189098.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/suxuxil.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/curwensville_lake_fishing_report.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/the_dark_song_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/aparato_reproductor_femenino_externo.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_off0000e585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE585 5096 bytes
SHA-256: 12ee1c89aaef0aef50e737ef6a09615429ab97d5807348b0cdadd06491b65a96
font_01_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 10440 bytes
SHA-256: 22bde9cc8b6ffd82af8ab208b90affc0344262b8fdacf45e451b94cebbe02ff3

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