Malicious PDF — malware analysis report

Static analysis result for SHA-256 4202c5bb5e17fbcc…

MALICIOUS

PDF

77.7 KB Created: 2021-02-21 16:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e9372fff3e9c0796af7b9d576772edbe SHA-1: 8fdc325b60a6bde46c5ccdcb64edb1dca791069b SHA-256: 4202c5bb5e17fbcce22eb26ae1582ec926496f9a967a1e125e9e493e75df171b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=metal+gear+solid+5+phantom+pain+achievement+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367644/normal_60019f16aa231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_602d34ae5ae57.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/dibxegc/candy_blast_mania_match_3_puzzle_game.pdfIn PDF document text
    • http://letnesil.xyz/davis_drug_guide_online_sign_injiuau.pdfIn PDF document text
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/vakademodub-jiber.pdfIn PDF document text
    • http://cabinetshub.xyz/zefussu64g.pdfIn PDF document text
    • http://3203epworthcres.com/1915109244829y5p.pdfIn PDF document text
    • http://idealicaitalia.website/24688906898lcym6.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/zarusegibitumet/pubimifezegaxozokanajej.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/right_triangle_trig_word_problems_answer_key.pdfIn PDF document text
    • http://xosareregaka.epizy.com/how_to_learn_microsoft_excel_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/fabigufo.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/ledabasidip.pdfIn PDF document text
    • http://dalufiba.rf.gd/doraemon_ending_song_video.pdfIn PDF document text
    • http://laxizal.epizy.com/hd_movies_free_utorrent.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_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5676 bytes
SHA-256: 6b78b2f50b02fb25734d2cc9d3d60f9577fc58c1fa5bf7f272c90d39c6a5f589
font_01_sfnt_off000103c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C1 11144 bytes
SHA-256: f40e1cb1cac43cd2befeffc821fd943cd54101445fd257d6f956350c516966dc