Malicious PDF — malware analysis report

Static analysis result for SHA-256 4244e86c7f658a42…

MALICIOUS

PDF

48.4 KB Created: 2020-08-07 07:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8e69d31d47c2ea6d2d833f87a4be4b50 SHA-1: 662bbc3bbe86316b8ed06d6d74c119e6f3ff9837 SHA-256: 4244e86c7f658a421c9440791ef6a75a51ef53c06325e3c4c4646f9ca9bcaa3a
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://ttraff.com/pify?keyword=ielts+speaking+makkar+pdf+january+2020 In PDF document text
    • http://files.awolclothing17.com/uploads/1/3/1/4/131437636/mipokijina-jajikij.pdfIn PDF document text
    • http://files.mac-italy.com/uploads/1/3/0/9/130969356/gejadixaragi.pdfIn PDF document text
    • http://files.clintholmesmusic.com/uploads/1/3/1/4/131437984/xinujezuzogit_vatiwinazuzuji_kusevovegu_vebugezorasig.pdfIn PDF document text
    • http://files.emeraldandvioletstudio.com/uploads/1/3/2/7/132740880/4660581.pdfIn PDF document text
    • http://files.mdsmeats.co.uk/uploads/1/3/1/3/131383665/nuxevilupiju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/xakuzividudogatofuwine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/31591292006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1087/4777/files/47427755238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/95433614588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/23567713846.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/57876042510.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/dictionary_of_archaic_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7064/4631/files/diploma_in_ifrs_acca_study_material.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73768917897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/fundamentals_of_fluid_mechanics_7th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0703/2990/files/dukubafonebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0951/files/dinafesukapelagi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7256 5588 bytes
SHA-256: 481a4c1f10bba482985e2279bc0d746841cb1b02e9fd07fb71e06f9be912b9c3
font_01_sfnt_off00008542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8542 9588 bytes
SHA-256: a93cd2d5246fde3cd4145a7d1c0535e34bbd7c36746b2f58f34cce6a433201cf
font_02_sfnt_off0000a608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA608 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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