Malicious PDF — malware analysis report

Static analysis result for SHA-256 b819a2c69ff2ccd2…

MALICIOUS

PDF

73.4 KB Created: 2021-01-22 15:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 67e378806e070ede4b8e0e61aa091d12 SHA-1: 0470f55a833259c82e2bf6ff5a6e5e049e6ad05b SHA-256: b819a2c69ff2ccd2bc1983e0639b326ac1b7005da3bac3631a7276de0a1f308d
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://seumenha.ru/123?utm_term=cash+app+hack+april+2020 PDF link annotation
    • https://cdn.sqhk.co/fudixaxogub/G8z8gcX/wastickerapps_new_stickers_love_story_packet.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/5150530.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/7585330.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/bgdifid/vojenud.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/017dedab.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/hj2ggju/photo_editing_software_for_pc.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/mibiwivanetuj/content_calendar_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/catanzaro_informa_incidente_botricello.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/27404693130.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/big_houses_images.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/annamacharya_tamil_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/easybib_mla_citation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/gexarupeweramilar.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/45967650167.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/tazigiduwozo.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/hunger_games_review_family_film_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/kirwan_commission_preliminary_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/renewable_and_nonrenewable_resources_quiz.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_off0000e490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE490 5264 bytes
SHA-256: 8cd4d2ccdf5dcb315a8f7325bea5b2af2c239be78efc9ee0a0eed9dedcb12bce
font_01_sfnt_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 10072 bytes
SHA-256: 4d5c4058420a90f005f56d8368240e5639b00b647511e928440139698921b960

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