Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6df2c602361748…

MALICIOUS

PDF

82.4 KB Created: 2021-03-28 15:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3fcfaadf5e29cf80e1b767eddf207b6e SHA-1: 03983ba34d1824987fe07bded52614e1aab47b95 SHA-256: 1f6df2c6023617488d5299518626dbcc2f25e33f04a945928ba08500c122a943
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+punishment+does+the+prince+give+romeo In PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/2833472.pdfIn PDF document text
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/4510546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_6037ca591fd2c.pdfIn PDF document text
    • http://dugikilosikilo.22web.org/why_is_my_tumble_dryer_not_drying_properly.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/248ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450152/normal_5ff48ed1bdeef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456166/normal_5fd13878be04e.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/3e4630b0c5.pdfIn PDF document text
    • http://gatorama.fun/best_digital_tire_pressure_gauge_presta1x9v1.pdfIn PDF document text
    • https://jupurelapuloful.weebly.com/uploads/1/3/3/9/133997255/kulogom_mudopamop.pdfIn PDF document text
    • http://vknart.xyz/0.13.1_minecraft_pep5lym.pdfIn PDF document text
    • http://mesubogit.22web.org/autocad_commands_in.pdfIn PDF document text
    • http://gonunimob.iblogger.org/jijaremakigofisizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7769226a-958d-4a53-9f91-81fbf16b86fd/the_koran_journey_to_the_books_origin_imdb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4038ad0f-39e8-46bc-84fe-8745fb07a7df/pogusegabefimexuvixef.pdfIn PDF document text
    • http://danojip.rf.gd/hp_elitedesk_800_g1_base_model_desktop_mini_pc_drivers.pdfIn PDF document text
    • http://begilokikilox.rf.gd/wevurulunajadadaluru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3ddbd51-f4a7-4ecc-931e-b0e33e215c73/bf_open_box_price.pdfIn PDF document text
    • http://jidapemoti.epizy.com/4th_grade_math_multiplication.pdfIn PDF document text
    • http://legujajojozete.epizy.com/42860209032.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_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 5528 bytes
SHA-256: 5f8b5707fbac94fed2d36bee7c5b13e66710cf4745a40e953cad2533ca40b7e5
font_01_sfnt_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 10520 bytes
SHA-256: 7fd7877b9e98ef9d1c137220b34b5f9129ca40f32943dd5e77786e077ea9ad63
font_02_sfnt_off00012533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12533 16104 bytes
SHA-256: a0e55c347ed5845944b1b45d53e61c164f8ab1c49ee6c0c7a14fb8dbd9a3d746