Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f754ad8c00da18…

MALICIOUS

PDF

87.2 KB Created: 2021-04-08 00:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46e9c139a7753da619482ddc5fa7365b SHA-1: 1007ca6143cbfaab80548233582fd708b0938801 SHA-256: 64f754ad8c00da18f1758c5d02796e941e640b40d41046bc4888a55ac72d2cb2
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://yafferge.ru/strik?utm_term=hamilton+beach+oven+roaster+manual In PDF document text
    • https://cdn.sqhk.co/vamosopon/iAhdCif/83456856008.pdfIn PDF document text
    • http://cadenalia.com/film_american_pie_8_sub_indogaezz.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/glencoe_chemistry_matter_and_change_online_textbook_free.pdfIn PDF document text
    • http://laithub.pro/what_is_a_plot_diagram4kzxv.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/jdvN1id/aaru_tamil_movie_comedy.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/clipsal_product_catalogue.pdfIn PDF document text
    • http://tobafiga.medianewsonline.com/3517578931.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/Hhflibu/radiology_technician_salary_california.pdfIn PDF document text
    • http://govnosiakxws.online/sex_education_dvd_release_datejiogh.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://skout.tech/magicians_of_the_gods_hardbackyzxh3.pdfIn PDF document text
    • http://arevakar-travel.com/g-shock_mrg-g1000b-1a4_akazonae95h8s.pdfIn PDF document text
    • https://cdn.sqhk.co/vopovaroxamo/jgiii4u/71899414736.pdfIn PDF document text
    • http://byseles.xyz/pebofabunuzegowakorep070d.pdfIn PDF document text
    • http://prizinsta24.site/779617540357sje5.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/SdC4jfF/lego_star_wars_tfa_mod_apk_data.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://uploads.strikinglycdn.com/files/b1fe8e9a-adde-49e2-aac9-2b2ef1fa32e7/maintenance_on_briggs_and_stratton_engines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3acbcb6e-c6f9-4968-bd09-aa42ca63bfe0/how_to_sketch_cartoon_eyes.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/moxadazutagoxasab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6328c9-8ef4-491e-9ab4-502094193e2b/stinging_red_rash_on_legs.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/phenyl_ethyl_formate_msds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa064426-f92f-4da7-9fe2-0a2436243459/dajuz.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/ziserojulasewuzefelutop.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/anatomy_of_the_eye_book.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/langston_hughes_i_too_poem_meaning.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_off0001057b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057B 5084 bytes
SHA-256: f517fe6de495458817fa31193e5cb1393801fbe30a52b8ac03e2a1f75d357c04
font_01_sfnt_off0001168e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168E 12196 bytes
SHA-256: 93090ec5d80529e1e820908af5943a2116abe4979235f6e7f4c90a5bf22a56a1
font_02_sfnt_off00013f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378