Malicious PDF — malware analysis report

Static analysis result for SHA-256 620d398408cf40ed…

MALICIOUS

PDF

46.7 KB Created: 2020-10-04 05:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f21d8f84ffe056bf240358ee6a989187 SHA-1: e5e9b94e8fe2c97d987c34e56eb1a80724cfc88b SHA-256: 620d398408cf40edc250ffdf6dc59ebbd48899f94f4f660d0f3e2826507ac734
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=doctor+faustus+side+by+side+translat In PDF document text
    • http://files.victoriaesquivel.com/uploads/1/3/1/4/131438121/6261370.pdfIn PDF document text
    • http://files.forksandblooms.com/uploads/1/3/1/6/131606875/da5659252187798.pdfIn PDF document text
    • http://vogaravo.itwasonmyvisionboard.com/uploads/1/3/0/7/130775565/d5d48.pdfIn PDF document text
    • https://site-1039478.mozfiles.com/files/1039478/potukowaronolejapaxema.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/37488604770.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/b3c6994d-f38b-4971-b716-b879ed4035c2/magumokafedibodugozik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a875f624-1c12-48b6-8951-11eb4515c7a5/kovudezowesebijako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27cbd0f8-4186-4d63-8a9f-aecc99f74db0/88116598253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939d73be-e9ae-486c-84c6-14ad672e02b4/99644250174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbac409-73a4-436b-84f0-babd454ac54e/fumowuxamagametadifafew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7509/9041/files/finding_nemo_classification_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2053/5968/files/gbf_basic_dark_grid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6587/9965/files/wakagamuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4451/2154/files/taking_ar_test.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_off00006a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A51 5140 bytes
SHA-256: a3305aac01fbf261800a04f132cc19b2ce008cfb54dc8a0df2b91a0c4ba1360c
font_01_sfnt_off00007bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDE 10824 bytes
SHA-256: da0e403f8b4117aa42f591c0d9840ba71e45075365c64aca615b6629d6050ae2
font_02_sfnt_off00009fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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