Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4495bdac5b8b236…

MALICIOUS

PDF

44.6 KB Created: 2020-10-19 13:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1ec670f6fc3257cb903c14c40b8f1cc2 SHA-1: 64716d1c2a3b374a533ea01d6fd0355d0b0dc41c SHA-256: e4495bdac5b8b236b2763f02de33a886b49f0576ba49e205b93944f892b5d4a4
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=license+plate+template+pdf In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/4324389.pdfIn PDF document text
    • https://bonujuvab.weebly.com/uploads/1/3/2/7/132740321/309ec3.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/tejugiwivokizaf.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/xofapasol_tuwarifozes.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/warudogi-jutuki-baboxivux-xumatirogik.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/1/0500/0370/6006/files/que_es_una_entrevistas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9664/4016/files/ponte_en_forma_cocinando_con_ingrid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7187/3446/files/signature_skill_pathfinder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/muxulopif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d369df35-12a1-41a7-a338-5bb7cca8119a/25814977490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71126e3-e884-4b98-9ca9-c8b16050d8e1/xiloja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc35324-92ff-4326-a4d8-fed126b47b96/76209475965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a6935b-acfe-43a9-9276-9aad2b6ad584/57644308711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9098eb5a-832e-415d-b308-9e6123e1ed88/bonebasufavido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0853/9802/files/5064397762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/gowukekepojegulawuzokumuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2844/7900/files/23515340104.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7360/0678/files/88759983003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0351/6824/files/dilixopofuzedegosawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/jubun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6388/3949/files/81692809855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8695/2642/files/zolamoxuroxetarevizokeja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8970/2301/files/power_of_attorney_form_new_york_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/039cd647-d7fc-4807-9fc9-f0461f6116c4/circumcenter_and_incenter_maze_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63511f0b-75ae-42cc-93b9-e0e883f547f3/zefakosaruzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d7a035-d560-486e-9619-70f7f53af536/papegemubikinezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63285461-2d77-403f-b2e1-918d5db9f81e/73740380191.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_off00007084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7084 5148 bytes
SHA-256: a6e43b6e561d4198c4f599d7aefea1726765bac8c884440eddc55750e5a8693e
font_01_sfnt_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 10208 bytes
SHA-256: 67880055cb92dcb78226f94a06c4761d076930acc6eabc2b6455f09d3e8fba00