Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d7fd45e8a5a77e…

MALICIOUS

PDF

71.2 KB Created: 2021-04-08 08:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 879a8b44f46d3399885a0395ab1d8c60 SHA-1: 43ecb2043e525961164e00c576d3752419b6c162 SHA-256: 28d7fd45e8a5a77eb9d650d1ce68be4203567ecca3aceff20bab843ff4f8f617
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure designed to redirect users to potentially harmful 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://leonvi.ru/wix?keyword=citizen+watch+manual+h610 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fcd38b96a0a0.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamewojaf/fpGqthj/piginurutasikolimezogot.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/fciiyjC/supply_house_times_rep_of_the_year.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/friendship_vocabulary_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_60298ad25f415.pdfIn PDF document text
    • http://tepafuvofes.iblogger.org/disneyland_california_adventure_park_map.pdfIn PDF document text
    • http://jabilevij.mypressonline.com/9598429636.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/gupawonidekosokuzemaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407788/normal_5fccc972d235b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5fe7dd6005423.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/1FhgBhi/stunt_drivers_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_6057fee0d551f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_6018a0c195434.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/0Ejakhj/18012862066.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/sezabonoroporeg-likale-jefimoruja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_603baf0de022a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472204/normal_6063ce0e267bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407795/normal_6007a3c639e9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fc724349aa14.pdfIn PDF document text
    • https://xakewalite.weebly.com/uploads/1/3/4/8/134882175/jipotowutalelimobiba.pdfIn PDF document text
    • http://rotirir.mypressonline.com/jiwosa.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
    • http://gakilasefit.myartsonline.com/los_3_niveles_de_lectura_literal_inferencial_y_critico.pdfIn PDF document text
    • http://javasuk.epizy.com/dokiragagasetetaxufofap.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/kenmore_range_igniter_not_working.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_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5052 bytes
SHA-256: 9720f52595d68f410d3e772553b1acf44be6f5d20530e8f978ac6b67e6490f6d
font_01_sfnt_off0000dde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE9 10384 bytes
SHA-256: fc6f4201053f2fa3b931dc02487686d285083e4b04e6b0e34e6182ed12b3f19f
font_02_sfnt_off0001014f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333