Malicious PDF — malware analysis report

Static analysis result for SHA-256 88c0c4b2976c2c32…

MALICIOUS

PDF

45.7 KB Created: 2020-11-05 17:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 2243fe14562a2f7d0e44e212d807973c SHA-1: 427f98864dda9175032a3bf2a151aeb49206af9f SHA-256: 88c0c4b2976c2c32b31153d4631e3eb8149f53d6744c61d0adf05b337d7b7027
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/aws?keyword=free+download+full+movies+english PDF link annotation
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/6108871.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/8031279.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/9161308.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/6684166.pdfIn PDF document text
    • https://rinumobepora.weebly.com/uploads/1/3/4/3/134377952/sibogigoxatiriv.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/wuxuvadure-fanate.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/c1819b0c0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000065b5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000065b5.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009bf0.bin)
    • https://uploads.strikinglycdn.com/files/9b2316f9-4a5e-45e2-ad4d-7c4890e089f7/vistaprint_holiday_cards_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd697e58-4881-4ea5-8f2e-13361f723649/shirley_jackson_the_lottery_sparknot.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/84989633737.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/71656480613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4106/9505/files/samsung_allshare_cast_dongle_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/77883844727.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/sniper_team_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/post_bariatric_sleeve_surgery_diet.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/73529059744.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 extracted file (font_00_sfnt_off000065b5.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B5 5228 bytes
SHA-256: 44cfebd00f4e4ed0642cc326cca3cd2dadde5f3590ae51bf1c918dbdd84f5ae4
font_01_sfnt_off0000775d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x775D 10732 bytes
SHA-256: d3fe5ff07327a03f3925462841c3850a1d0ccad2c08697472386efd8cff11db3
font_02_sfnt_off00009bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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