Malicious PDF — malware analysis report

Static analysis result for SHA-256 6738ebcfb41e05b2…

MALICIOUS

PDF

42.8 KB Created: 2020-10-08 07:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b2c517814524e8ed6f1221823fe371e7 SHA-1: 79ec8b685cebcafd7ef5bfe032e78464566511e7 SHA-256: 6738ebcfb41e05b28a59fae0c6c5669d8dd58d991c1e38704e61f82731309db8
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://gettraff.ru/strik?keyword=dahua+cctv+camera+price+list+pdf+2020 In PDF document text
    • http://voxibedob.melshand.com/uploads/1/3/1/6/131606407/7d6a6f65ee0.pdfIn PDF document text
    • http://files.marchesdetauxdinteret.fr/uploads/1/3/2/6/132683014/394157.pdfIn PDF document text
    • http://bubogiv.carnegiehouse.co.za/uploads/1/3/1/3/131398097/3661731.pdfIn PDF document text
    • http://jelim.janel22.com/uploads/1/3/1/1/131164250/6945667.pdfIn PDF document text
    • http://konokob.criminelerechters-criminal-judges.com/uploads/1/3/1/6/131606687/wudukobodiwanuwas.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/1/0497/7875/3697/files/85975439687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6347/2028/files/anti_machiavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8354/0901/files/rocky_mountain_radar_phantom_t.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/touch_screen_car_radio_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/minibadiwekoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7484/2531/files/dissolution_by_proclamation_annulment_of_authority.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff109380-7ec7-4f05-b1ca-523fc82f9415/5060449980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fc16be-5941-4cc2-ad85-3bb4436c98b7/51591358735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed564428-cc86-4cba-b9cb-48f6b34ffca7/tegagomukunasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53677f5c-a100-4ee6-97ce-976deca2411f/sopoviwimofopafizato.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_off00006588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6588 5728 bytes
SHA-256: 60827baacd0ca7b5111897f6897662fe79a3eeeeb51a2334a9857cfda3bf5ae6
font_01_sfnt_off000078e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E7 11016 bytes
SHA-256: 9c20f4f655e1bebfa6950eef5519891880aa75d3b00143a8ebf5f65052416688

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