Malicious PDF — malware analysis report

Static analysis result for SHA-256 a342dffeb861df62…

MALICIOUS

PDF

44.0 KB Created: 2020-11-08 01:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 406d8ed039692118b8ce9305976cdcb4 SHA-1: 794d1aab486de60593b8dae646b3912371c650e8 SHA-256: a342dffeb861df6203bafb126a371c30c0b2293079c94a853e54e697218fa7f9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=canon+fd+lens+repair+manual PDF link annotation
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/5305658.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/wopujemufonaxeboz.pdfIn PDF document text
    • https://bujozimadepaxed.weebly.com/uploads/1/3/4/6/134615651/togibegoxubix-jofisufoza.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/8419.pdfIn PDF document text
    • https://zuxobopabure.weebly.com/uploads/1/3/4/3/134344154/xijom-tomuzo-zufiz.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/5793932.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4731286-ecfa-44c5-abbe-7a578d2b5e74/pojatitabedoteveluxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322a034c-c02e-4046-a95f-4aed08932d00/89790455752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c452f77-71ea-4d06-8be6-fbbc1393ef38/hp_pavilion_x2_10._1review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1383f73-812b-4518-826e-76b37c538701/wamaxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7b4ff8-ab8f-4510-bbfc-359596bc9371/contaminating_the_arctic_reading_ans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e58394-4451-4ac5-9403-aa699bcc6dfb/sozijefibawok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f898999-a729-405d-a526-cc79bc205b7c/lebugekukoroviwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad589234-c070-4c0a-a2a4-8b4418061b2e/de_crucigrama_do_ar_para_acima.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_off00006c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 5092 bytes
SHA-256: ab491c11474adfa3882bb2508ebc53b6d3bf667d9aed97d0e1a0f1b895dcc464
font_01_sfnt_off00007dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 11036 bytes
SHA-256: a2787959b226f99b36bf09e508ca2747cdf1c667d50b5e374803de7ff5b25129