Malicious PDF — malware analysis report

Static analysis result for SHA-256 3edafe8f4a183ba2…

MALICIOUS

PDF

42.3 KB Created: 2020-10-07 02:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 975214c7b6c07f901ac321dc9180f135 SHA-1: e8d8a2ed64f5ed47e3c67339060fb03c5d0a98ea SHA-256: 3edafe8f4a183ba229b249fe2dec4d8015416fb4ea4a987fbf666dbd484be7ab
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=christmas+piano+books In PDF document text
    • http://files.fostercarecoalition.com/uploads/1/3/1/6/131637092/zulegemib.pdfIn PDF document text
    • http://wufitofa.buckinghamcharitycup.co.uk/uploads/1/3/0/8/130814769/4a7c4.pdfIn PDF document text
    • http://fodexa.perchancetheatre.com/uploads/1/3/1/3/131384600/a803713e2fb1d8.pdfIn PDF document text
    • http://petivimit.childemotionregulationlab.org/uploads/1/3/0/7/130775565/gasepavurilum.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/1/0431/9179/5873/files/ferrari_kit_car_for_sale_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/1313/1418/files/vopugomemofomamivid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/nigijeraxigegatigidake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1408/5544/files/27512644575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7682/files/mavimijumomeveruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9261/7632/files/53050115277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7231/4778/files/mapa_fisico_de_espa_c3_b1a1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/twic_card_port_arthur_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/xalow.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_off000067ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 5136 bytes
SHA-256: 60ef6c09f825a962dd09d6163c672082ccadb3b311f61abd76e17956380899d8
font_01_sfnt_off00007923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 10300 bytes
SHA-256: 1096c7612b6c0d43cdc6a193ddff51d7ca83d00ca5439e618de516d28fe543d1