Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d2df973e9f4de6…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 00:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 89324f91c80a0aec0b35d351a16e6594 SHA-1: e09178d66ed1529e4b1fd517a68895928fef61c8 SHA-256: 22d2df973e9f4de67ed0c98faf8559c78e03126d159d718c65c5fdcb44715b34
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=secondary+math+module+3+answers PDF link annotation
    • https://cdn.sqhk.co/mezutorixo/B1jea7C/stick_fight_warrior_mod_apk.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/jobarere.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/M1hh0VZ/game_royal_robots_battleground_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/kjbjdEr/2384821536.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/9327067.pdfIn PDF document text
    • https://sufepupebesi.weebly.com/uploads/1/3/4/6/134636280/xazokaxowe.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/dakebesuvum/bigasoft_video_converter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/planeacion_de_la_auditoria_informatica.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/xavatusosonejazuta.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/attestation_employeur_destine_pole_emploi.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/khan_academy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/mafezuzuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/fajidudapipudesukafima.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/liverpool_vs_arsenal_3-_1.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_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 5640 bytes
SHA-256: 77fd023002c8447af5f8f9c14af9dff9891c5a7bfb81cdf48e77dbfbbd83d52d
font_01_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 9936 bytes
SHA-256: 6cc89f8fb242595bb03e57c6e766d7d083749920e915f214ded83d80d758294c