Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae6324c1537b06a…

MALICIOUS

PDF

77.7 KB Created: 2021-05-10 08:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fbc7a5660541a7804846a5c1eefa105 SHA-1: 5b7cc2a3053fcbf7aca878cb0a18ca14252e15ee SHA-256: dae6324c1537b06a070473ba32b50e764fd0a82ecd3d9ee09cd242b52f800f61
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://druttle.ru/strik?utm_term=how+to+setup+my+honeywell+wifi+thermostat PDF link annotation
    • http://fortuneo-enligne.com/moluvadogelorazapitue5r1h.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/74987596095.pdfIn PDF document text
    • http://saxoxiwu.iblogger.org/marriage_certificate_form_up.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/3071614.pdfIn PDF document text
    • http://remontnatali.ru/zusizafewisefab14lyk.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/hiagijj/wirodobupafebasavinemolil.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/is_cyberpunk_2077_multiplayer_coming_out.pdfIn PDF document text
    • http://fonivoguko.medianewsonline.com/audience_analysis_in_communication_skills.pdfIn PDF document text
    • https://bakijowo.weebly.com/uploads/1/3/4/7/134726649/8828233.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/ZjaePii/survival_crafting_games_xbox_one.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/4hfKJRw/42836554906.pdfIn PDF document text
    • https://cdn.sqhk.co/zilidadakole/eYja1jd/werewolf_cat_power.pdfIn PDF document text
    • https://worejatejele.weebly.com/uploads/1/3/4/0/134095890/2808336.pdfIn PDF document text
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/bc8bdc.pdfIn PDF document text
    • https://cdn.sqhk.co/repudodo/hbYKvmS/lufogevodanoru.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/65221536270.pdfIn PDF document text
    • http://deflecfcvy.best/diamond_by_bowtech_infinite_edge_pro_compound_bow_package_reviewtod5t.pdfIn PDF document text
    • http://bamiduvunaw.iblogger.org/jolly_phonics_big_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27b3396-1246-4538-80fa-2dc2de47f864/what_are_the_different_option_trading_strategies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9657ce2c-6bf3-4e21-b6e9-3b963f55460b/analysis_of_the_open_window_by_saki.pdfIn PDF document text
    • http://voxafizuvukulam.epizy.com/wills_eye_doctors_in_philadelphia.pdfIn PDF document text
    • http://fadojogepu.epizy.com/29457167249.pdfIn PDF document text
    • http://rariresujeta.rf.gd/andaman_and_nicobar_islands_places_to_visit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b211bf51-6a02-4e9d-a215-6f9f92b38957/sandisk_sansa_clip_zip_8gb_mp3_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ae11e3-a8ef-4a8d-9c5c-f4204e4a634a/lexus_es_300h_used_cars.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_off0000f1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C8 5296 bytes
SHA-256: a7f285949599bb7772204819e8088c554b2fcdea2ab4cfa5b39f83da6c298c09
font_01_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 10904 bytes
SHA-256: 4463713350310c11c9360f0a987cf5e727bea68966b28ce27b2c325b747cc971