Malicious PDF — malware analysis report

Static analysis result for SHA-256 4acce5bbefdf6398…

MALICIOUS

PDF

42.5 KB Created: 2020-10-08 07:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 9f5b08db1c969d5c9141cbf422cbd192 SHA-1: d923c3949326f51048e4d65cd4afc84f239d1918 SHA-256: 4acce5bbefdf6398e8027b83ce22d221cf0a856f8bbafa0827ae7da236929f1e
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=el+rapto+de+la+bella+durmiente In PDF document text
    • http://files.laurainthelibrary.com/uploads/1/3/0/8/130814258/bumurorulujixevibo.pdfIn PDF document text
    • http://files.leetorda.com/uploads/1/3/1/6/131636728/7523371.pdfIn PDF document text
    • http://files.mirchaiya.com/uploads/1/3/1/3/131380625/notizi.pdfIn PDF document text
    • http://nifib.ericdschultz.com/uploads/1/3/1/3/131398225/mikivogigejumot-movuda.pdfIn PDF document text
    • http://widajufi.depthstiny.com/uploads/1/3/0/8/130814579/jajuvabegojenoj.pdfIn PDF document text
    • http://files.regerconstruction.com/uploads/1/3/1/3/131380236/e703c33.pdfIn PDF document text
    • http://files.ebrubinsteinassociates.com/uploads/1/3/1/4/131406082/givuvowulonos_xomupimonakenut_rojodutorepavuw.pdfIn PDF document text
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.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/1/0479/3489/8332/files/out_of_this_furnace_thomas_bell.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/iron_maiden_judas_be_my_guide_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4829/9417/files/letter_to_parents_from_teacher_distance_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2358/0322/files/electronic_pulse_massager_pad_placement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4660/8282/files/hot_dog_cooker_and_bun_toaster.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1163/3062/files/79103677615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2412/2524/files/ratijijepowo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6965 5024 bytes
SHA-256: b86b243fac980a6148ed96457ec463534e2f187344cd7f6ab19030792149e25f
font_01_sfnt_off00007a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A59 10196 bytes
SHA-256: 5639cc4dfd780bbdf95670570d49fc4d6e19d9ac35e06124f3459e138a878773

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