Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa1efbc64c0f175…

MALICIOUS

PDF

72.9 KB Created: 2021-02-14 14:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0a437ce6fcad2c273d923eb3df1a38f2 SHA-1: 5d2522e6e2a2b06c4132d91a312f9d6ae8335e0c SHA-256: 2aa1efbc64c0f1750dc2888b287e50d5a07671af676e637b5f50c51692294ddd
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://maypoin.ru/wix?keyword=fraction+number+line PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416939/normal_60013b555d598.pdfIn PDF document text
    • http://bofinaposo.iblogger.org/bangladesh_army_admit_card.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491445/normal_5fca99e5b89bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fd7c93def143.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473023/normal_6005e71ac9041.pdfIn PDF document text
    • http://bavewemelemare.iblogger.org/54846599185.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/cloudformation_get_s3_bucket_name.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/nigerian_nursery_school_curriculumz5qpz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482415/normal_5fcd9eb965101.pdfIn PDF document text
    • http://feruwikabi.iblogger.org/nissan_owners_manual_case.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494891/normal_601387309f613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fe481f2b4dcf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_6003e87f57368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_601dc9202f876.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/gurupixabogivaz/alice_in_wonderland_children_s_book.pdfIn PDF document text
    • http://pefodajisotavuk.rf.gd/clostridium_difficile_guidelines_cdc.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_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 4864 bytes
SHA-256: d7611f4434c0edc5414cabccbb7d933610140556880daec119e817c61420ebdf
font_01_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 10520 bytes
SHA-256: 21bc159afb84762c17fee8a2ad74609ab7d06fa16181f96c791a32128a92db32