Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8417a6e0c440d5…

MALICIOUS

PDF

37.9 KB Created: 2020-11-05 13:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5f94941e732faaea3d43d1a355e9cada SHA-1: 910d166d598b807a7eba97a498d4851f1242f08e SHA-256: fe8417a6e0c440d5904cba710472dc2d7f8eb816a83127ded06064115db8963e
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/strik?keyword=amadeus+full+movie+online In PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8a740c.pdfIn PDF document text
    • https://dubamuxurel.weebly.com/uploads/1/3/4/4/134463085/foneziroganive.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/zosevid/unity_mobile_ar_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/horn_of_valhalla_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/ww2_paratrooper_gear_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/36305120351.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nuwew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abf7e6da-f374-4bd4-8ef9-3a5bd35c345c/22302410998.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/purple_dragon_strain.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/75026530806.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/40715782805.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/35215950086.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/tevawakijexiru.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/xuxuviravu.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/public_awareness_campaign.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/14536665197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f4edebc-7729-4627-a26d-ef570c452380/wizovirub.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_off0000563f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x563F 5004 bytes
SHA-256: 7bb41ac1179c2b98bd8f592e510eae7cfbe736e35e14f274e36b3bf67ee7e98a
font_01_sfnt_off0000673c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673C 10360 bytes
SHA-256: b0b1f2a1e9d8302e1d8919bc74fb6bf53ba2a56f29ea5d8e906e14fef900ecf0

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