Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f754168c047189d…

MALICIOUS

PDF

38.6 KB Created: 2020-11-01 10:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: edb49c7f71ee6f29fc24ce715a363bfb SHA-1: dcd994f3f73c19a410aaa0391de3a5af2675d554 SHA-256: 1f754168c047189db140f639db7fbc6e828c0707f345bbcc60cf2a7791d7fbb9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/pify?keyword=my+hero+academia+season+2+sub In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/zikoviwodedupili.pdfIn PDF document text
    • https://budezovurok.weebly.com/uploads/1/3/4/5/134507550/41812.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/d0c271de38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f91fafc1e4e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004d3c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004d3c.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00007fa5.bin)
    • https://uploads.strikinglycdn.com/files/02ac38a5-52a3-4d78-a138-246fe427efba/93877275901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306a6cb9-e649-4995-830b-127b21358454/malena_movie_2000_online_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ba035c-117a-4466-9bba-a2ca54147128/galusefupurunugidivikopog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7512c332-5268-48d4-ba75-db273f810b9f/othayadi_pathayila_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd7bf9e-8519-4a56-9439-e43621a0d338/ez_chill_auto_air_conditioning_recharge.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_off00004d3c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3C 5328 bytes
SHA-256: 8b944f4a629490a858d899bcd20c4363503b9f99a7850d5415909c17056e4802
font_01_sfnt_off00005f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 9488 bytes
SHA-256: 9300cd74dfab3851b8b53bbc7a4cf6c9be151cc96ba292b4c96069e867535b74
font_02_sfnt_off00007fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3