Malicious PDF — malware analysis report

Static analysis result for SHA-256 5787bc5104fcb1b4…

MALICIOUS

PDF

41.5 KB Created: 2020-09-30 00:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc399989a3d128010edfb4ec3f230e4b SHA-1: 80bc2145e129bef18779ce0e88523b30b0626631 SHA-256: 5787bc5104fcb1b47ed7cb157600b0a101f71f30d281f79077c5f8122b99766b
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=pillars+of+eternity+prima+official+game+guide+pdf+download In PDF document text
    • http://nemibuz.ostendmarineservices.com/uploads/1/3/0/7/130738836/913396.pdfIn PDF document text
    • http://files.littleparentontheprairie.com/uploads/1/3/0/7/130775156/fe9c68e32669.pdfIn PDF document text
    • http://files.highgearcoaching.com/uploads/1/3/1/3/131383514/4b1c5.pdfIn PDF document text
    • http://zexofijok.curriculumengineers.com/uploads/1/3/1/6/131607019/kekadetiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/431315c9-5d78-41a0-bdc4-c6e4c58224dd/42504611152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2359b3a9-93ef-4726-bbcb-bb6c03c66b8b/32956721459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d584be29-369f-47cd-8677-57ceb674597b/14899455932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c9fe8d-08fc-4ae6-83a8-694193a2ecad/wowiligixebafedubezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/060b743b-e4ef-4a58-8e47-c2a785241264/gorizew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8254/6341/files/gobijudowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9744/7831/files/moxukavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/lezilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/excel_bedingte_formatierung_wenn_0_dann_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/11385556264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c1497b-75c1-4121-87de-aa0644937c6b/jabonofagolebigumuvune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51687aec-d672-49a9-8912-3358a2a954d9/21624247503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1b7f9ae-098f-485a-9f36-70bf55c6b8e8/tabamikebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d122b1-1fb3-4dac-bee6-9d0bea3fab9e/12452448655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0226073-7372-4dcd-b1c5-83bf8f0efefc/vixoxurobejimurafa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000563c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x563C 5552 bytes
SHA-256: 0e78d090dd3bc112aa2b5537b24c0ab02393ca038602f577c9cdbbd12dac3870
font_01_sfnt_off00006911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6911 9800 bytes
SHA-256: 885b5eccb0a97996694bde9fd4dfc6d704b7e47c927523942c472f62c82d5138
font_02_sfnt_off00008a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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