Malicious PDF — malware analysis report

Static analysis result for SHA-256 57af0f9e4b953177…

MALICIOUS

PDF

41.9 KB Created: 2020-10-10 17:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3e55a7f4d73b9e47fb91313c7df17389 SHA-1: 5327845f5543a8b04b59cd89db762be007a0b1e0 SHA-256: 57af0f9e4b953177bc46f1c9866150bc156c798d5fa54f376fedd68178c48079
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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/pify?keyword=daconil+2787+mixing+instructions In PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/8095833058.pdfIn PDF document text
    • https://site-1036759.mozfiles.com/files/1036759/dumarufuxogujazovi.pdfIn PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/74157300439.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/zigewekibit.pdfIn PDF document text
    • https://site-1042101.mozfiles.com/files/1042101/saliwafamib.pdfIn PDF document text
    • http://gakivura.cocopahfarms.com/uploads/1/3/1/8/131856072/tilogedodi_sunuxowunod_zibidub.pdfIn PDF document text
    • http://falade.eibenteaching.com/uploads/1/3/2/6/132682974/dujakubatir-rawemeso-sawula.pdfIn PDF document text
    • http://files.smhsbaseball.com/uploads/1/3/1/4/131452997/1979238.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/9552/3227/files/sharper_image_hd_action_cam_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/duo_therm_furnace_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/selenium_webdriver_practical_guide_source_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/zupuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727e2433-5a24-4fb5-a7c9-8150d1e52dd0/zovemimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cacc7e-b55f-4de8-83c3-14cdfc63b7ae/bowobufurumuwulixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77e9d8f-70be-40c6-a753-d4956dfb8eb5/21762133933.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 5592 bytes
SHA-256: cd77ea1902aa4e55bbcbc0fc66dbcc6b85940eb75ae094e35f3408dc7f47dc25
font_01_sfnt_off000078e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E9 9752 bytes
SHA-256: ac73fe74757505a5e68dce2fa578362f9b82bbb6991c552d9742603cacc1c6eb

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