Malicious PDF — malware analysis report

Static analysis result for SHA-256 165b28a2b5fba47d…

MALICIOUS

PDF

72.9 KB Created: 2021-02-11 11:06:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 38de87f65924bf3c50202bac1fa40162 SHA-1: c01db8e70429920aa83c78160537c51e03818d1c SHA-256: 165b28a2b5fba47d0c01ef74d1e067fcceb6f8bed1a968503c1013b82b425293
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://seumenha.ru/aws?utm_term=android+emulator+online+for+pc+free PDF link annotation
    • https://cdn.sqhk.co/wepigosogo/hiB3pBr/bottle_flip_3d_world_record.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420432/normal_600b51f84c9fa.pdfIn PDF document text
    • http://igafnd.org/debate_examples_for_studentsjau1r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494146/normal_5fe2490842ea1.pdfIn PDF document text
    • http://crysety.xyz/kupabuwoijw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375696/normal_6005252bd8218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405179/normal_600ea9bfd20a5.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/gchigeV/word_blocksatz_letzte_zeile_links.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/rHighi5/77730304901.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/gjfhdgc/sowemarisaxidabizi.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/xefezesebusu/badshah_telugu_movie_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/tegapativujovobudolobe.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/90810946078.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/adjective_form_of_word_earth.pdfIn PDF document text
    • http://ropolawurafur.epizy.com/cohen_s_masterpiece_piano_sheet.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_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 5112 bytes
SHA-256: 4c9309ed459b03b12637513eb119f27b1a7f61ba510c3ce27a61c23b9124cab3
font_01_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 10868 bytes
SHA-256: f16c5a0afeb14222ddb6a5d59d26c17cd4698584f82b5f5d5b807d7a1d8a9104