Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80d089dc2fcb0b3…

MALICIOUS

PDF

46.6 KB Created: 2020-10-31 03:00:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0f79780d49ab638c13e88ac21d7cc10c SHA-1: 902699527a4370035c20a0961f841e4b9bbd9979 SHA-256: a80d089dc2fcb0b3752a374f9cd6cc9bdcefea1d161806efbb42dc877af34129
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=mortal+kombat+5+mod+apk+unlimited+money In PDF document text
    • https://mevamakokuvafas.weebly.com/uploads/1/3/4/0/134040887/ab21718e0226bc.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/790db9747cfc28.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/8647159.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/javulepot_deniwefibawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/all_animals_names_in_english_to_telugu_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/solving_quadratic_equations_by_graphing_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/capas_del_modelo_osi_funciones.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/find_cumulative_distribution_function_given.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/66250225728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a47c4dd8-2fa5-4a94-9e9c-ebe0c0bd3a2d/4330819513.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/1768528357.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/texto_cristianos_para_jovenes.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/android_root_apk_without_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/parts_of_a_camera_body.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/80972728328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6324/6485/files/phone_line_tester_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0c83de-c490-4f36-92f5-e2a71f9c7b55/61260161020.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_off000074e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E2 5364 bytes
SHA-256: 12a19257ad151377ab5cb5ec32d4c6bb07ed4114ef8108f6cd4c224dc443aa6d
font_01_sfnt_off00008719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 11064 bytes
SHA-256: d4e7b4aaca63234ba0832c3686b47fa01fb190c32328170f4aa538a8afe412e2

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