Malicious PDF — malware analysis report

Static analysis result for SHA-256 85fad02eeab832f3…

MALICIOUS

PDF

73.2 KB Created: 2021-05-15 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0ed1a3e63a3c3b049cbbb2b0377d21c4 SHA-1: 20ae0702c7c4ec95a7d2ee9f868a68d8ab3ae57d SHA-256: 85fad02eeab832f34e95506b32aebbc484599e2c80c58aa06556dacc6411661e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting or link farms, suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to 'transmission range sensor' and application metadata, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/strik?utm_term=where+is+the+transmission+range+sensor PDF link annotation
    • https://cdn.sqhk.co/xotosira/iftjajf/the_cheetah_girls_soundtrack.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/border_song_video_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/heQc1hh/marble_run_toy_directions.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/ijahhfm/makalah_jantung_koroner.pdfIn PDF document text
    • http://dewisazovuvoxi.mywebcommunity.org/lixanebazi.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Z3r93Ap/marble_racing_2020_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/fhjRgdn/meet_me_app_free_download_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwovejivu.rf.gd/reported_speech_sentences_and_questions_konu_anlatm.pdfIn PDF document text
    • http://pujumek.myartsonline.com/how_to_check_coleman_mach_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f947443d-4bce-43d0-a36d-3af3eeda5175/detijotatazijofuvatajojek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf6728b-4254-48a2-9898-4dff521b25db/john_deere_48_mower_deck_parts_list.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/oracle_database_11g_installation_on_redhat_enterprise_linux_7.pdfIn PDF document text
    • http://jurevadevama.epizy.com/asus_rt-ac66u_firmware_update.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/27525921715.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/migliorare_l_autostima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cabbe9c3-cddd-457a-ba61-0081cf0d7e3a/3985030637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694294ed-1325-4aa7-94f2-27067e7d5768/wojatumesa.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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 5080 bytes
SHA-256: 1682e3c7e00255e6958d5df7abf5d8cac9c2b704685fad74c39ad7edf0f6b3d2
font_01_sfnt_off0000f3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FD 10360 bytes
SHA-256: 3d948fcb771048094d457acc6fb19b2e0e14b950f4401ad168091e2facd51440

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