Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b8cbc8899413815…

MALICIOUS

PDF

62.3 KB Created: 2021-01-20 02:43:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5c522ec844439f2bb1bf502af045cf03 SHA-1: 29be16c2fa66b46d97627f629c990aca76df7281 SHA-256: 8b8cbc8899413815562f3d2bf92b18e5bc03a1232bb0b45fc80e7096adae9669
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://baarspo.ru/aws?utm_term=bengali+film+borbaad+songs+free PDF link annotation
    • https://cdn.sqhk.co/tomubozes/fghnFR2/lyrid_meteor_shower_april_2020_california.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463308/normal_60027654813f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fde9f264639e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469136/normal_600400d9b00c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369788/normal_5ff6675d8d4c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kekumumaxow/CUjcgik/xodiduw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450034/normal_5fa0325725778.pdfIn PDF document text
    • https://josapepukixo.weebly.com/uploads/1/3/1/3/131384602/tililo.pdfIn PDF document text
    • https://cdn.sqhk.co/sutadejuna/vjggjhh/95393743499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455380/normal_5fe67a0acc2aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_5fb54c85b394a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381340/normal_5fef0a0a2027a.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/nabifovu/blank_abn_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/carving_ski_technique.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/51438136714.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/50569761124.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/gamibemefivo.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/gafafofawupapokunopirejo.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_off0000b63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63F 5416 bytes
SHA-256: afbb4b808e1e20d8bf51e02c6ae6acc9843d3dc1ff9bb16aa332d5bba475ab54
font_01_sfnt_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 10384 bytes
SHA-256: bd96ee571b76eda422127fd036b8cef3c6e1b9e5425e9a479cb7624e980c4080