Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f823891921b150c…

MALICIOUS

PDF

68.1 KB Created: 2021-03-08 18:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 13ecff388fd5b9ba66819da5a6c09150 SHA-1: ce7cf870e67b957c0fc0fd46ff7acc8422397fa6 SHA-256: 7f823891921b150c483c1f40387f7535bf225455887a3eb842d93a7ffc8e76da
182 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and disposable hosting. 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 users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8129

Heuristics 4

  • 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.
  • 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://yafferge.ru/award?keyword=all+basic+electronics+components+pdf In PDF document text
    • http://remoliwagofaju.mywebcommunity.org/free_wordpress_theme_builder_software.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/85509818039.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/how_to_enter_bios_setup_in_hp_pavilion_dv6_laptop.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/competncias_socioemocionais_bncc.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/goxuz.pdfIn PDF document text
    • http://riratasixok.22web.org/rupukonimomepetepedez.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/zatupinomerorubasix.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/sotugijilumiseta.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/how_to_learn_calculus_online.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/7b4be33c-4f6d-4a84-9c2f-26cef22ff2e8/how_to_backup_iphone_6_on_mac_catalina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38186aa-7e4d-42f0-b5a7-584c3db747e3/zusunifekomitaduwexo.pdfIn PDF document text
    • http://delezomixotu.epizy.com/sodikaganix.pdfIn PDF document text
    • http://fobukisa.rf.gd/in_what_part_of_the_country_does_the_story_take_place.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_8028e41a62664b49ac7155ad21f3f4da.pdf?index=trueIn PDF document text
    • http://bepolujogox.atwebpages.com/pezawunaviruw.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/46124474623.pdfIn PDF document text
    • http://fatufale.epizy.com/10871742356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d499d9f-5a37-4bd6-897d-f247bf41fae1/imax_b6_error_connection_break.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8c8606b-094f-4273-ba3c-31cd6d224473/how_to_tell_which_wii_model_you_have.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_752b11705109447a94a68e0ca49ff162.pdf?index=trueIn PDF document text
    • http://gefegasoro.epizy.com/dixuso.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67A 5432 bytes
SHA-256: 30a5701dd7a4a6b1807c1ef37beae5cb46bb6de4e79d33406b55fb5f53e6ba2a