Malicious PDF — malware analysis report

Static analysis result for SHA-256 4908db6374689ed3…

MALICIOUS

PDF

75.3 KB Created: 2021-03-06 00:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9bea10c677aadc75290d3ead847b747c SHA-1: df3be7e4b9d155324228db933308999e18288049 SHA-256: 4908db6374689ed3dccdebaa42492729b96c8f7a3cc8b4c59bb6234eeba0e820
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It functions as a link farm, directing users to multiple external URLs, with notable examples including fokemale.ru and foyou.store. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme, likely involving spearphishing attachments as the initial access vector.

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
  • 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://fokemale.ru/strik?utm_term=nordictrack+x9i+treadmill+price PDF link annotation
    • http://foyou.store/youtube_forgotten_weapons_fg429mge7.pdfIn PDF document text
    • http://desokore.medianewsonline.com/dirt_devil_hand_vacuum_filter_f101.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/bupofironolajikapil.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/simixosababe_xasepus_soxoxolik_kudeta.pdfIn PDF document text
    • http://cmb-eco.com/44424466536gdss1.pdfIn PDF document text
    • http://zazonowipudu.66ghz.com/fofugonomojirezowufek.pdfIn PDF document text
    • http://ketotreno.buzz/zapafedarivuwukisamox6z3d7.pdfIn PDF document text
    • http://pc-remont.website/systems_engineering_and_project_managementk87uj.pdfIn PDF document text
    • http://pavajevubuj.iblogger.org/17390728082.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/english_conversation_book_free.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/dokatemabupub_topigezer.pdfIn PDF document text
    • http://pro-komp-master.website/11308239911qnik9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vusukunuvedigup.epizy.com/plot_diagram_free.pdfIn PDF document text
    • http://zudavowopo.epizy.com/nezufulimobajip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd2c040-5be3-46f5-aab5-aa6b50708db4/41723413549.pdfIn PDF document text
    • http://xeliposemufara.rf.gd/en_el_nombre_de_jesus_letra_y_acordes_ingrid_rosario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9aba86-433c-44d2-8cf4-e307c79e0f6e/zombie_roadkill_2_mod_apk.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/65755061384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e841c28-daec-4ab0-90c7-aff6a8bd418a/iv_treatment_for_inclusion_body_myositis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defa98c3-f53e-4b96-aa93-8ffeef3e0f83/the_girl_who_owned_a_city_ot_nelson.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE552 5300 bytes
SHA-256: 43ee6e708d0a7164540d4117dfd1e7d336d5ba3de8129b5ac365969c99194836
font_01_sfnt_off0000f74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74A 12692 bytes
SHA-256: 32e4b66e2ec92e2ed207a939c0d372e9cf5e152d1c781d22af2575c0aa0b1619

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