Malicious PDF — malware analysis report

Static analysis result for SHA-256 437df0eb7639e5b0…

MALICIOUS

PDF

66.2 KB Created: 2021-03-01 20:51:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2335ec472da016d85b893e57e9ea6adc SHA-1: 2cfe48973c2474b76de89cae8409bb937fb36f99 SHA-256: 437df0eb7639e5b052ab5b17e8a41782150fb647a0eb0643c1810dc0a47a5435
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://xajibur.ru/award?keyword=diary+of+a+wimpy+kid+wrecking+ball+pdf+download PDF link annotation
    • https://cdn.sqhk.co/weruvewo/hnjgo1R/nigitawosar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_60349a9845fe2.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/hiaRhi1/sakhi_mp3_ringtones_free_download_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fec830d19cbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455901/normal_5ff7721f9ed48.pdfIn PDF document text
    • http://digozulujatozuj.iblogger.org/tevosakajikexoweliten.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489598/normal_6003d405798de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_60198f350545b.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/61361141973.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/dazinibonofobi/baldur_s_gate_enhanced_class_guide.pdfIn PDF document text
    • http://xavemiwikujuxuk.rf.gd/all_hollywood_movies_list.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/mekuwonukujomazijefora.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/wuwuk.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/lean_six_sigma_green_belt_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/christina_grimmie_just_a_dream.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/xapasaza.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/mayhem_movie_parents_guide.pdfIn PDF document text
    • http://nijetazum.epizy.com/70_s_soul_music_s.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/4215673789.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/41381533882.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_off0000c58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58C 5692 bytes
SHA-256: aab689b3e85ac1f085140d6d79e16c0c0b4b91504cd6432404719f161b1f2ace
font_01_sfnt_off0000d8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 10092 bytes
SHA-256: 17d3ee89e28db6ed047b025bf1f8139a24f2b0b8cbc6edbb53e8fa417831cf88