Malicious PDF — malware analysis report

Static analysis result for SHA-256 d159a79bad79d430…

MALICIOUS

PDF

67.0 KB Created: 2020-10-05 02:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 69b517d382aaa87599cd0d953a0f1216 SHA-1: 7104248203a7cbeaf479934718da8bd5d0298a01 SHA-256: d159a79bad79d430c9600d139c8457631052e52a4b4d4b212e90f9bd9e7decc7
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=the+foreigner+2017+ram+gopal+varma+download In PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/vowogexamug.pdfIn PDF document text
    • https://site-1040575.mozfiles.com/files/1040575/nopavifurujexuvurir.pdfIn PDF document text
    • https://site-1038869.mozfiles.com/files/1038869/89576464135.pdfIn PDF document text
    • https://site-1038737.mozfiles.com/files/1038737/viluxedonavopirerajuxenil.pdfIn PDF document text
    • http://pufofed.cyclingfreedom.net/uploads/1/3/1/0/131070374/rosonekisawotowa.pdfIn PDF document text
    • http://tiluwami.plateauvalleyanimalhospital.com/uploads/1/3/0/9/130969627/b893b.pdfIn PDF document text
    • http://zutiwuxa.benholguin.com/uploads/1/3/0/7/130740000/572194a032.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/dugit.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/wefat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/32156960412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2852/8808/files/xiputanalej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1740/7134/files/change_over_time_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/ademco_vista_20p_keypad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5381/7252/files/rockcastle_shooting_center_hotel.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

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_off0000a884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA884 5784 bytes
SHA-256: 74c46a619da29b501ad3a74635955cadff29855a783f32d46cf6dbaf5516a675
font_01_sfnt_off0000bc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC30 11616 bytes
SHA-256: 48f459e7810a023e89b9652ed9477346c097741e2414c8c8154184dcd1b22768
font_02_sfnt_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 10304 bytes
SHA-256: d84fb6f8465fd42d6e6f0167b22c483443f2567e0221ddd486ef7e0b97b7c2af

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