Malicious PDF — malware analysis report

Static analysis result for SHA-256 9648709621c27d5f…

MALICIOUS

PDF

66.6 KB Created: 2020-09-30 18:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5ac7b84ce54e9e432304b94d0d68a8a7 SHA-1: 2df5af5d7afd7ebf0c9c4578169d51321e32f6ee SHA-256: 9648709621c27d5f4caa599d4fb217e21ea2cd03a8b9ee8450c5abe4fa8ec713
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://ggtraff.ru/strik?keyword=angular+4+tutorial+pdf+free In PDF document text
    • http://files.stringtheorytennis.org/uploads/1/3/1/1/131163910/kefoxelurobinezijex.pdfIn PDF document text
    • http://lebewina.yogadancelife.com/uploads/1/3/2/7/132712663/dedilasiwaxa.pdfIn PDF document text
    • http://files.davenportkartway.com/uploads/1/3/1/8/131871658/6008e80.pdfIn PDF document text
    • http://files.chrisjohnsonmx.com/uploads/1/3/1/3/131384777/75397.pdfIn PDF document text
    • http://files.younionstudio.com/uploads/1/3/2/8/132815968/607806ed4577f72.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/82aac0b3-2aad-4ba4-998d-ccba309f2069/68825275186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ecb6552-9e4d-47bb-8996-987296dd4912/toliweteropo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e62e363-e464-45f8-bd2c-b591e307227d/81565376167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f1cfae-548b-4ca8-bdb9-ea09c1948d49/84812017444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09a7ce0-dec8-4efb-8a6c-e8da6b9e03dd/tazixoxekaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6449/1161/files/olympia_motorcycle_gear_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2985/4368/files/78502077620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3102/6071/files/vepowit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0992/3481/files/resignation_letter_template_word_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0042/2819/files/atom_text_editor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9c1956-ec0a-423c-a3b9-8d9a5cf5b889/88237601298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b34930-336c-4abe-a6fc-a02e59849d83/bopilivowenobibatotan.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_off0000c014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC014 5108 bytes
SHA-256: 543cdad71f72182507066ee7cade826900f42f87617e231232d8e974a99e8850
font_01_sfnt_off0000d193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD193 13660 bytes
SHA-256: 0eec0743dfcc50daf9ffe70914b747996cef3c582c536080c23137236e0bc77f

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