Malicious PDF — malware analysis report

Static analysis result for SHA-256 b880ace2d7acff81…

MALICIOUS

PDF

61.9 KB Created: 2021-01-27 18:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4d251c229245c41544f39ae855b28329 SHA-1: c5b8e366ae4a6763ab55b71f22e0686593dbc9e6 SHA-256: b880ace2d7acff81b5bbb536c3492ad8c0f0dd13853ffe4909795b82f541dc35
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/123?utm_term=spiked+lug+nuts+14x1.5 PDF link annotation
    • https://kizozejibudi.weebly.com/uploads/1/3/4/4/134460324/6641444.pdfIn PDF document text
    • http://amin-ukraine.net/lullaby_songs_for_babies_12_hoursapw6g.pdfIn PDF document text
    • http://fimewot.xyz/rafugoxolugqr38o.pdfIn PDF document text
    • https://raxeruzuk.weebly.com/uploads/1/3/4/7/134743740/49ef5cd96.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/favuwejanetid_fujife.pdfIn PDF document text
    • http://exampl1214.com/kozajelutodn5r7i.pdfIn PDF document text
    • http://help-violation.com/retroarch_steam_link_streamryji0.pdfIn PDF document text
    • http://xsale.trade/8158457724hko9l.pdfIn PDF document text
    • http://busurman.space/83041749847fezav.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/bjbUohh/nupup.pdfIn PDF document text
    • http://4gusevshop.space/0ljbv.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/sajatofubote/belarus_562_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/best_hip_hop_dance_beats.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/zubolabeparalovomeroka.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/my_amnesia_love_movie.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_off0000b251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB251 5352 bytes
SHA-256: 86d21587448028731134645ab76bcedff53aaf6775f83c7671b6e8e3c09b6a45
font_01_sfnt_off0000c4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B7 11788 bytes
SHA-256: 92770869e95c8f8d2c9cb05052aa8ea701e30bc87cbfd2828c6622f7b5d8ad91