Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fa613113595a898…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 06:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 133181128aeabbdfb1121d281153cd8d SHA-1: 56f5c988bd00289132879cd7074305eb1da148c5 SHA-256: 8fa613113595a898724db9ffb9d29845f1637764dbbc4c481561a4278e874708
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to 'content writing jobs online in chennai'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=content+writing+jobs+online+in+chennai PDF link annotation
    • https://cdn.sqhk.co/kotolodegag/ggZihdU/i_won_t_string_you_along_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/b37cjyX/ultimate_fishing_simulator_nintendo_switch_review.pdfIn PDF document text
    • http://copyrighytsupport.com/letters_from_christopher_watts_book2zm9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_5fd175e4657d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fc79b2bf2461.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_6022173f57111.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/ijhfzge/best_balance_bike_for_bmx_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_60219e1993ada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_5ffdebff6686f.pdfIn PDF document text
    • http://copyright-securityx.com/social_psychology_definition_apaji2xs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_6027062fc4620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383916/normal_602d0d96c1b11.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/holst_jupiter_sheet_musicjk3t8.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ehfighb/t-_mobile_store_manager_salary.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/rovuweraja/brawl_stars_beta_gameplay.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_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5272 bytes
SHA-256: 0d7a4cf96484eeac824901a7525a4e48b0e6969a23607573e7b90c9e655c4aa8
font_01_sfnt_off0000f2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 10880 bytes
SHA-256: 83b73f14dd5066560ef057fb5528610dd6bfad7766dc5fe20a8507e29ace1d5f