Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a75d1896169ecd…

MALICIOUS

PDF

38.9 KB Created: 2020-10-28 18:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 786999dde1bbd5c833eb0218a1ab61ce SHA-1: 107f0639a34a17f241a7ce63bf6f50315c8e666c SHA-256: 20a75d1896169ecd889fda08fd595e7a41170b36465393380a8b1aa4a3751c04
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=usa+fastpitch+softball+rule+book In PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/7b6e30b8798800f.pdfIn PDF document text
    • https://bivovipolever.weebly.com/uploads/1/3/4/3/134347360/goluvomunojan.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/gevoderovepiru.pdfIn PDF document text
    • https://keziripar.weebly.com/uploads/1/3/4/5/134522929/0a5c7e7842f2f6.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/2965615.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004e1c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004e1c.bin)
    • https://uploads.strikinglycdn.com/files/258675e1-af9d-4add-9e17-610720baf428/6441234811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c75f058-a441-456c-938f-349a98868280/bawefezuzife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6595ac68-b551-45e8-afd0-4d1accf26056/povifokijomul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e64135-78b3-43c8-b3df-9125d9efa907/32138543978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff3c7e4-9001-41a2-b254-8f9c5708dd67/crown_forklift_error_code_309.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/above_and_below_game_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae7680c-e543-4676-9ead-26f29d452fe3/ruxevozumiwasajoxejeweb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2f7bf6-4196-4899-bb43-c7e7ec9b9d09/babixawaratawakepiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb418fc-a762-4e08-b82e-bc57419648c3/82417791583.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/91150552559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd18ede6-b6fd-4283-8a5f-5440ec69182b/jomuvajif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e981fc3a-5118-4e04-bbc9-927958e62227/kazakarubamupizoxofa.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/lifedo.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/4766939581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/117cbe78-e89a-492d-aa8b-8f2fdb09e19d/silence_on_the_wire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae02008-b901-4377-bc34-156126b5304d/temoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d86e9b-500d-42bf-a161-e191887a3876/xuboj.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_off00004e1c.bin)
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn extracted file (font_01_sfnt_off00006019.bin)
    • http://www.gnu.org/copyleft/gpl.htmRegularIn extracted file (font_01_sfnt_off00006019.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1C 5300 bytes
SHA-256: a1800e24c8075376593bb11a5d5ec6c0552bf35db4af94d665cc4131e7bdd585
font_01_sfnt_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00006b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 10040 bytes
SHA-256: 3132afa9c9b0e7153ffc3f1fa26df1b6d61a265c75fc7df1e06b557c84ddc4ac