Malicious PDF — malware analysis report

Static analysis result for SHA-256 9566ff35d3e6a216…

MALICIOUS

PDF

72.2 KB Created: 2021-02-20 18:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a3a225947ae54aa42dfe7179915b5211 SHA-1: 77c3cfbb1d7c4002816f23eed9934aed3c51642b SHA-256: 9566ff35d3e6a216c982051d658aaf6208901adee4680d7fb8d508e22648a7b9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=supersu+pro+chainfire+apk+free+download PDF link annotation
    • https://cdn.sqhk.co/fawabanof/LQhgcNv/download_clash_of_clans_apk_for_pc.pdfIn PDF document text
    • http://rafale.store/ambani_samuthiram_video_songsp1h0d.pdfIn PDF document text
    • https://xapabareduvan.weebly.com/uploads/1/3/4/3/134395213/nimusekuxasos_fovipifi_lefilok_fufegowiv.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/igGleLz/lopudako.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/foratofimavovekuzuviwe8986p.pdfIn PDF document text
    • https://sozezitevi.weebly.com/uploads/1/3/4/6/134639304/gotovafemazuwudi.pdfIn PDF document text
    • http://francobusiness.com/93328455446f4pcs.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/luropi/novolog_insulin_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/javascript_backtick_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/85502131844.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/constitutionality_of_restitution_of_conjugal_rights.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/are_there_structural_differences_between_male_and_female_brains.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/bogawabanepofatalalol.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/atrocity_act_amendment_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/92868303531.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/81768078724.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/romoruvopifes.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_off0000dc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC51 5500 bytes
SHA-256: 76d7e4ca15d98a7faa514898f1eb1b747f60b84d0a5ea7c800ac13be2d1f26da
font_01_sfnt_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 10820 bytes
SHA-256: d0c52a117a6301fcbcd137b0d858d2804dd85ebdb2fae5e665d1c63f735b0286

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