Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d6aaf591f2ff92e…

MALICIOUS

PDF

109.4 KB Created: 2021-03-11 06:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9405bad152294dc6caf5cfb114737400 SHA-1: f6f23cbce4d7fa4601014be9843348e3f208eb79 SHA-256: 1d6aaf591f2ff92e610249859304c87dd5cbe3036c26c2350a4523778a727aa1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain that appears to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=vanguard+etf+performance+ytd PDF link annotation
    • http://mobutadaxez.medianewsonline.com/59314185169.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/a9ghiia/31835732696.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/jiidsQg/doodle_run_app.pdfIn PDF document text
    • http://zuluguvo.iblogger.org/how_to_install_ice_maker_in_fridge.pdfIn PDF document text
    • http://gabubixaj.22web.org/business_information_technology_university_of_johannesburg.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/linksys_ea6500_v2_openwrt.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/canon_powershot_sx720_hs_troubleshooting.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://uploads.strikinglycdn.com/files/86468f85-7bfe-4f06-8475-05d6e75ffe5f/bosch_ts3000_gravity_rise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451aa1b8-192f-4668-b30a-1dd20eb7010b/does_samuel_beckett_bridge_open.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/vejoraxetozivelusopa.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/the_rosie_project_book_club_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bdd571d-bd80-4843-8b10-c561dc8863a8/xabakokifibijobowofazawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a63d55-4de2-40b6-a9a8-f70ab4bef151/86316877209.pdfIn PDF document text
    • http://nirirojigupe.epizy.com/evenflo_triumph_car_seat_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5276c9d-ee5d-46a3-926b-b3f696d7dcbb/what_does_apple_tree_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e5b0c35-bb59-4569-9436-4e6a35005ff0/28854444498.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/ashes_cricket_2009_wii_iso.pdfIn PDF document text
    • http://zoletafexogixa.epizy.com/12820756426.pdfIn PDF document text
    • http://pijularof.epizy.com/13799929128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f9902f-3295-4ca2-836b-90065f1e4e12/zeralotelifix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f71cade-4647-4e30-a9eb-120b92d33aad/xineroxirarirusuz.pdfIn PDF document text
    • http://mujelolix.epizy.com/just_jazz_real_book_download.pdfIn PDF document text
    • http://timivaferegigor.rf.gd/arachnid_2001_movie.pdfIn PDF document text
    • http://badokelo.rf.gd/capitulos_de_dragon_ball_z_los_androides.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_off00016122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16122 5164 bytes
SHA-256: e513a09474aad87b93ef9bfe5a7bfd495e52fa7112bdea099ddd3d484337d99b
font_01_sfnt_off0001729c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1729C 11392 bytes
SHA-256: da8bce20c0b13650a030d919b51d66437f4fbdaeb4b65482698cbdd09391fba9
font_02_sfnt_off0001996b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1996B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34