Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea4d6854383f016…

MALICIOUS

PDF

66.6 KB Created: 2021-03-16 03:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0b4843db73959e0b426753bfbac894c6 SHA-1: 67d7a6bf140548b697b300e61ebffa580872f055 SHA-256: fea4d6854383f01621b7f212d2545fd2a57a5cd3f88df5718119678b060c6969
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to a 'scavenger hunt map worksheet answer key', which is a common tactic for phishing or malware delivery. No scripts were extracted, but the presence of external links and the overall heuristic firings strongly suggest a drive-by download or phishing attempt.

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://kuzutuzo.ru/wix?keyword=war+of+1812+scavenger+hunt+map+worksheet+answer+key PDF link annotation
    • http://fasadi.site/zatukalotupeziwalox8jod.pdfIn PDF document text
    • http://pet-guru.shop/84497706125k3uox.pdfIn PDF document text
    • http://mosquito.codes/que_hacer_en_la_ciudad_de_mexico_20192btgv.pdfIn PDF document text
    • http://naturwows.space/venexanaxavzy7sd.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/56881395784i5fno.pdfIn PDF document text
    • http://supernefritroller.xyz/begapolon7n60m.pdfIn PDF document text
    • http://item-get.top/12033205330eh8l7.pdfIn PDF document text
    • http://dvertsoff.ru/18980424322hbamc.pdfIn PDF document text
    • http://itprod.space/what_are_the_rare_girl_namesr0pis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/force_field_analysis_template_xls.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/samsung_galaxy_s9_camera_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f776bc18-1e63-4ef5-b38f-65f4c00ee8a3/gididuduxizukupasazikan.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/how_to_assemble_little_tikes_police_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a3eac5-abee-432d-b32f-6444a2f0eae1/wd_my_cloud_usb_supported_file_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b222a87-7bb9-44a6-8c1e-c85404cc3e06/golusuwebutanom.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_83060f92568e4cb7889b80dd0cce39a7.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_509072368a5444eeaeb4b57030dae65d.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_08733a9f992148ea8c15c567cd9fca81.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3866559a-7b8c-40f8-b488-e490ca5b4eee/driver_audio_windows_10_realtek_hp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a953e7fd-9811-44e7-85e9-f573b66e71b4/begebivazitemopojajanev.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_off0000c415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC415 6108 bytes
SHA-256: 79677545fa0a84af126c10d80643c700f3c3c4181b8436f04a1f1fd6f02e8b38
font_01_sfnt_off0000d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E6 10644 bytes
SHA-256: e38d43c19b64e77cc95e48a973c42ae57d63042b1d6b203e15a27fdf1d60b8cc

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