Malicious PDF — malware analysis report

Static analysis result for SHA-256 f557c838c95a1582…

MALICIOUS

PDF

74.2 KB Created: 2021-02-17 15:58:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8b4bcc9fec6e39c67491bf2ff5035b6d SHA-1: 422d2181af2d6d8f95e180b6b2d3a02e4b30f965 SHA-256: f557c838c95a1582f6b609278b2e79dbcb0826cc47a8a604b7d8fd3ff11c95c1
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=soul+of+the+fire+free+pdf PDF link annotation
    • http://videohost.space/adafruit_fingerprint_library_for_arduinoy7e53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445726/normal_5ff2643009205.pdfIn PDF document text
    • http://4gusevshop.website/13890476032w1jtn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_6005507668c03.pdfIn PDF document text
    • http://potolkilife.ru/intermediate_accounting_15th_edition_chapter_15_solutions1k83v.pdfIn PDF document text
    • https://cdn.sqhk.co/setewefasari/lHHmSif/costumes_near_me_walmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422622/normal_5fcb737cb2149.pdfIn PDF document text
    • http://rodsfish.club/a_level_economics_study_guideaoo1j.pdfIn PDF document text
    • http://fajiragudabega.iblogger.org/infinite_warfare_retribution_trophy_guide.pdfIn PDF document text
    • http://sefobadivura.iblogger.org/25781403789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500674/normal_5fed51fb87955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_60237f80a3531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_601d186323a35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_6017a07189052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwavunetese.rf.gd/nafirepilodisiji.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_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 4844 bytes
SHA-256: 80a655582bcee73d5ba1eca1ce577ae4aaee09e08861cea0aad27c730fb41797
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 10196 bytes
SHA-256: 53c4f7cbe499a4e0e5ae952b968fd135ff5bb4eb497da20be6cf5a58012d32de