Malicious PDF — malware analysis report

Static analysis result for SHA-256 667c1705b866970e…

MALICIOUS

PDF

114.8 KB Created: 2021-03-19 11:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: acf7db29a91f44f13a13adc4ad062fab SHA-1: eaf8875b1da2c86a7a65d715a336053e6acfe17a SHA-256: 667c1705b866970e709d1ba557c6cb338d11b5cde50abf9110951e2d60ba79b2
94 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • 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://yafferge.ru/123?utm_term=insect+population+ecology+pdf In PDF document text
    • https://cdn.sqhk.co/wotedimozer/GhjkMjb/crossfire_x_pc_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/QsceQjg/nipixuvatos.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/50811318262.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/392idMJ/sewejijifojojat.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/agjdhap/15775774374.pdfIn PDF document text
    • https://cdn.sqhk.co/siwowoso/icWHjjR/mosolitopanirojazo.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/pinguino_air_conditioner_lt_code.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/ifHiihj/forward_financial_bank_marshfield_wisconsin.pdfIn PDF document text
    • https://cdn.sqhk.co/fudopalizew/bGib3je/ultimate_forest_simulator_1._2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rafopaluko/1xDhjpB/zagebimase.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/50664374565.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/fupixigivifabovafubazu.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/iiVGqjd/34379164110.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/vatosolikijike/wopurikiworesujegekijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132e5e50-454c-4ad1-83f5-337cbef1cf0a/how_to_learn_calculus.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/kojenax.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/does_nespresso_have_gift_cards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251c8602-1892-4448-8582-2f6b08511a15/maschine_mikro_mk3_ableton_live_10_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2247f6be-5ba2-425f-9aef-f6b11139cdd0/dance_music_1990_hits_playlist.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/41816840605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc297ea-f217-447c-b730-d0ee8e2b5d95/what_are_calluses_on_your_feet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BFA 5264 bytes
SHA-256: 114c8c614c810407d58691dac8443ee7c22202515b6071c05f47d02dbea1c231
font_01_sfnt_off00017e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E08 12760 bytes
SHA-256: 0bcd3755d29ddfc0a4bda65381089b1887ffad0cde5d6831c2db5d55723d7a43
font_02_sfnt_off0001a8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8FF 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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