Malicious PDF — malware analysis report

Static analysis result for SHA-256 0577f191c21cbb56…

MALICIOUS

PDF

78.6 KB Created: 2021-03-27 22:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05adf6c035aded6e829f336fbc3a6bbd SHA-1: b47987e6d056d04409d10fffd1dff50d356d640b SHA-256: 0577f191c21cbb56bb8f811d4d77f4207332ece7da115b9a2f7d93d6ea5e0021
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a primary suspicious URL pointing to a disposable hosting domain. The document body, though heavily obfuscated, contains text related to 'Caddington village school uniform' and 'wkhtmltopdf', suggesting a lure for users interested in school-related items, likely to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=caddington+village+school+uniform PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418747/normal_5ff256eaa16d5.pdfIn PDF document text
    • http://216tilford.com/qdialog_close_button_signalp1t6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_605534273261f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_603c0347f4144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_60317383148b2.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/armageddon_gear_revolution_trigger9huz6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_6014694e1b699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_601473f975dca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_602c47a77ce45.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://s3.amazonaws.com/rabewiruzitewa/tenenezebexuxure.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/samsung_galaxy_tab_e_sm-t337a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc8c5a04-23ad-4ed8-bb16-51f0f8334e8f/a_little_life_book_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc64632c-35c6-4b1f-abbd-7359d64ef963/que_significa_soar_caminar_sobre_agua_turbia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba2e6f87-efdf-4fe7-a393-d3fc1e1aebe4/35197151309.pdfIn PDF document text
    • http://funurebebepoti.epizy.com/78514631571.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/cisco_2960_x_series_datasheet.pdfIn PDF document text
    • http://tajijubu.rf.gd/bissell_powersteamer_pro_deluxe_manual_8804.pdfIn PDF document text
    • http://najenovatuxi.rf.gd/how_long_do_i_cook_a_waffle_in_a_waffle_maker.pdfIn PDF document text
    • http://xapitolo.rf.gd/how_to_make_a_green_christmas_tree_look_snowy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d711af06-0447-438e-9f99-50c82dd36290/84501310555.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_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 5400 bytes
SHA-256: 1b4e8a1be7c9b3f721c0cc572017bad0a98e2c6a927548c6fe1f05afd470ec3a
font_01_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 10540 bytes
SHA-256: 8f00bd68db6579ffca7f09622353500b673a921cb4451ce6551030aa4f2e54b7
font_02_sfnt_off00011efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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