Malicious PDF — malware analysis report

Static analysis result for SHA-256 955b3e204e3bd2b0…

MALICIOUS

PDF

62.1 KB Created: 2021-02-15 02:33:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d337e91d6b9aac594846270322a17d94 SHA-1: 65bb4df832ecdc0ab98a30451672ed981302fd61 SHA-256: 955b3e204e3bd2b0aa093e1dd9972395f6e1335c509e214c7e98f76abfe35988
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=kelvin%20and%20celsius%20conversion%20worksheet PDF link annotation
    • http://heliusdesign.ru/synology_ds918_quick_start_guidechzum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_60002e222dedf.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/eget2vR/saudi_ksa_online_shopping.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/Qicjhji/rumowegepikoxewivasafek.pdfIn PDF document text
    • http://white-x.fun/zixin2nipf.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/fgjdGOC/55536584833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_5fd83e9bbffa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_601735626d656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_600d6659df01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_602814624a18d.pdfIn PDF document text
    • https://cdn.sqhk.co/xokunafuse/ghigdhi/65716441762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477401/normal_601dd7833ca42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_5fd0fe1b4f783.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/tinezedu/53899041279.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/95243801273.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_off0000b671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB671 5212 bytes
SHA-256: 6bf63829864cd66ab42d0cee3de86d100efac16dd64d1603cb3742ae38ecc58c
font_01_sfnt_off0000c83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83A 10260 bytes
SHA-256: 004e271a74787a76c6011be75c916c330fdc3159931f9bbf39fec1cabe6e5900