Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f56a48e51c7418b…

MALICIOUS

PDF

86.6 KB Created: 2021-03-17 05:18:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b63ddc33e370ebaee6601c821c748a7 SHA-1: a40b712f4bb7e6b81497b223987bd6cf7fe9695f SHA-256: 4f56a48e51c7418b35835f3c53c62ff48298426357c7ec5a01e6966656671593
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing lures. The heuristic PDF_SEO_LINK_FARM indicates a large number of generated links, and PDF_HIGH_SEO_UTM_REDIRECTOR_LINK points to a redirector URL. The embedded URL and the document body suggest a lure related to a game trophy guide, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=saints+row+3+trophy+guide PDF link annotation
    • https://cdn.sqhk.co/putizimetiwe/5haHEjf/movie_theaters_near_me_amc.pdfIn PDF document text
    • https://cdn.sqhk.co/jefutubup/4jgjDa0/clinical_guidelines_for_diabetes_type_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/4YwhgHh/josuwilobisiwigowe.pdfIn PDF document text
    • http://fivibimotuwar.22web.org/noritz_tankless_water_heater_flushing_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxaguzifep/Ohhkjdl/52970754545.pdfIn PDF document text
    • https://cdn.sqhk.co/rapavuse/Aibhggi/carmageddon_2_download_utorrent.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/Sidw6KA/centipede_grass_seed_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/INsjhig/fast_food_restaurants_near_usc.pdfIn PDF document text
    • https://cdn.sqhk.co/kojanakif/gdfifia/xojerobanomabig.pdfIn PDF document text
    • http://mafonofolifeda.22web.org/fupologeledizirovero.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/nufidibodudulad/47723477122.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/74183254331.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_cf4793d90aa54e20ae3d2064adab62b0.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_51d0feb0283448a799cfd2f0e72c8be5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setikizo/6886633275.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/facebook_background_template_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/1958046244.pdfIn PDF document text
    • http://tuwetixa.epizy.com/formatting_code_html_notepad.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/intramolecular_and_intermolecular_forces_worksheet.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/ap-_ls_forensic_psychology_specialty_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/informer_amazon_prime_imdb.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_e45758459f274420a1a2dc0459f78776.pdf?index=trueIn 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_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 5652 bytes
SHA-256: 1e9907ac1098ddce1fd029adf38387ec2a09262a18f10f258384af8c1f7284a8
font_01_sfnt_off000125b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 11556 bytes
SHA-256: 8ca1229b5534473ba9fbc993079bc8c7050589b8a0d13c6137504a42c646180d