Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc94e6fbddd5eae9…

MALICIOUS

PDF

84.7 KB Created: 2021-04-02 10:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 133afe6c4606e0e34c556ddeab413dfd SHA-1: 2825e4b0ebbc76bf1feecec2d85c25cfa0ce9512 SHA-256: fc94e6fbddd5eae9d0ce244adccc43a1f65baf26628a32fa1c199a14f27ac52e
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to disposable hosting and known malicious redirectors, indicating a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing malicious software disguised as a necessary update or extension. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of exploitation and redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://yafferge.ru/strik?utm_term=how+to+pair+logitech+k350 In PDF document text
    • http://movawugutel.22web.org/accounting_for_general_management.pdfIn PDF document text
    • https://cdn.sqhk.co/kiviziko/KOZ8Rgd/choomantar_remix_song.pdfIn PDF document text
    • http://cuzinfo.ru/75959159706rgsvg.pdfIn PDF document text
    • http://gesemalisezusa.iblogger.org/co__t_d___c____hangman_answer.pdfIn PDF document text
    • http://vitezozikupu.iblogger.org/what_is_another_name_for_jowar_vegetation_answer.pdfIn PDF document text
    • http://opencabinets.xyz/el_principito_pelicula_online_gratis2sk8i.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/zihghie/sozizo.pdfIn PDF document text
    • http://wozekozexufoxol.scienceontheweb.net/simple_bio_data_format_download.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/81863098143.pdfIn PDF document text
    • http://vaxakunuxabuga.22web.org/61933174079.pdfIn PDF document text
    • http://verification-help.business/32580568437qd0ds.pdfIn PDF document text
    • http://vseti.life/nexus_mod_manager_premium_crackwnvnk.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/monopoly_cheaters_edition_rules_money_distribution.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://kutoduno.rf.gd/lived_crossword_answer.pdfIn PDF document text
    • http://wuwepapose.epizy.com/20377645801.pdfIn PDF document text
    • http://lovinanijorabe.epizy.com/short_biographies_of_famous_personalities.pdfIn PDF document text
    • http://wepaxilex.epizy.com/10345418890.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/enfermedad_cerebrovascular_isquemica_2020.pdfIn PDF document text
    • http://gusagikatu.rf.gd/xotawepozarugomupataf.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_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 5244 bytes
SHA-256: 8e963d55dd5323043b8cc413cc5880a85e416c2fb110f247e3d28f484a7b25c3
font_01_sfnt_off00010f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3E 11240 bytes
SHA-256: e9e1da4f44b59d1cc8bfc4497b6dc60907d19b8853e6a72d9c1b58ae1a0cea79
font_02_sfnt_off000135ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c