Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0f7c24324b9d3d…

MALICIOUS

PDF

56.6 KB Created: 2020-10-04 16:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8710377b6f6ec7413a21f5fa00047f4f SHA-1: e6ce339d76944780c10ea616afe2a0d2c014cef1 SHA-256: bc0f7c24324b9d3dbc52d953f72e67479492332767bb5737547ea7220c385aae
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/strik?keyword=fox+and+mcdonald%2527s+introduction+to+fluid+mechanics+8th+edition+pdf+solution In PDF document text
    • http://files.hgoldsteincpa.com/uploads/1/3/1/0/131070459/6710324.pdfIn PDF document text
    • http://files.martinadulted.com/uploads/1/3/1/4/131482937/zabumaxe.pdfIn PDF document text
    • http://files.odellfergusonstudios.com/uploads/1/3/0/7/130776591/bb7af95a6266.pdfIn PDF document text
    • http://files.vineyardandwineservices.com/uploads/1/3/1/4/131407227/fb5ca444b2b.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/20351009036.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff684e52-e94e-4418-9b1a-762957b896f0/29681414518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/396e89bf-21b3-47cd-b829-48cff953270c/14142351841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/dont_look_behind_you_youre_not_going_that_way.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2399/7856/files/project_cars_achievement_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9326/6074/files/3694794642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/container_store_near_raleigh_nc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5825/6286/files/12338138593.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b05e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB05E 20316 bytes
SHA-256: ca8dfe1a1774e48b7bdc3460041cf4620ce98ee8c86ae7e8b2ca6f7c4c62e175
font_00_sfnt_off00006c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 5644 bytes
SHA-256: 3b48ec4bdc3ad1125081cff16245b5559ab00e4ae532a7e94d5003377b4b744c
font_01_sfnt_off00007fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 15936 bytes
SHA-256: 54f7bcb5388b703dedfbf0376f35900931238959dbc83fd867c063e40c22ba4d

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