Malicious PDF — malware analysis report

Static analysis result for SHA-256 76639389b184572a…

MALICIOUS

PDF

72.1 KB Created: 2021-02-16 22:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4c5776bbd83b31be76c581e2c34a9199 SHA-1: 29280e9cd8facefd9d0be80eff0f3633752bb3a2 SHA-256: 76639389b184572ad51a78a3b05c44c2a7925d48f1f8230d72a78d5b6e316b92
134 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=v+shred+program+download PDF link annotation
    • https://cdn.sqhk.co/rigowodikot/Pjfhbhf/devat.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/TgjAAom/kudujexavakubovu.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/fLdid9s/gesuwuzez.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/1inhhid/twisted_tea_flavors.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/FL5idD6/song_association_words_list_generator.pdfIn PDF document text
    • http://leoidet.xyz/lalufexaterozunodedofinogcx6r.pdfIn PDF document text
    • http://natbeach.space/28489156840ybsu8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473954/normal_5fed12de6f050.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/fuwuzerijofa/matchless_chieftain_manual.pdfIn PDF document text
    • http://kisuneronebel.rf.gd/nexeditegefelimibiwegof.pdfIn PDF document text
    • http://busixojap.epizy.com/basis_set.pdfIn PDF document text
    • http://dotemewu.epizy.com/certified_nursing_assistant_renewal_form_california.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/numezer.pdfIn PDF document text
    • http://bixogonabu.epizy.com/99303492450.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/handover_report_sample.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_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 5432 bytes
SHA-256: 061ce105817d2e106767b95c85b64250ac2ea68e738ce129f664387d0c818909
font_01_sfnt_off0000edf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF8 11024 bytes
SHA-256: 03eda7e1861caca9e7c7f4a4c40570f6dfefca83ad5e54a3ad6ad4e9f39b8b22