Malicious PDF — malware analysis report

Static analysis result for SHA-256 287287d0d869a1df…

MALICIOUS

PDF

80.6 KB Created: 2021-03-29 10:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fc44a17d4f981d371e1a7210d812d6f0 SHA-1: ecffdbe8775646cc6193d2c05b1d6ff0168b035a SHA-256: 287287d0d869a1df6d4bb30f5fcdfc6a6f2b55f9c589c0877608a43788274041
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=native+american+cinderella+story PDF link annotation
    • https://cdn.sqhk.co/babonisu/w8xDidS/guess_the_telugu_movie_names_with_english_words.pdfIn PDF document text
    • https://raxaregos.weebly.com/uploads/1/3/4/3/134363135/karujegapoli-xuduva.pdfIn PDF document text
    • http://povatunu.iblogger.org/gunabafivetudulibowoda.pdfIn PDF document text
    • http://rozapunu.22web.org/schwab_advisor_services_platform.pdfIn PDF document text
    • https://woperuxotuxolo.weebly.com/uploads/1/3/4/8/134849923/1116041.pdfIn PDF document text
    • http://forajetivajuw.iblogger.org/bamimawanorijusevafedasi.pdfIn PDF document text
    • http://losamaresufalu.22web.org/lorewan.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/468420.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/Ohbhbhc/gepanekukosiveb.pdfIn PDF document text
    • https://cdn.sqhk.co/kubabulukod/fqsIMg7/gitinofeguwi.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/MjdlDjh/cosmos_pizza_obx.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/tiiAkqL/tower_conquest_mod_apk_happymod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rinubokuj.rf.gd/argox_os-_2140_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/74006415730.pdfIn PDF document text
    • http://puwekaxaxowiza.epizy.com/zurivevugadovufotibamiso.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/gl_assessment_maths_familiarisation_test_answers.pdfIn PDF document text
    • http://fuluputig.epizy.com/manual_espresso_machine_cappuccino_maker_ecp3630.pdfIn PDF document text
    • http://validexa.epizy.com/86599179728.pdfIn PDF document text
    • http://xebowuruno.epizy.com/79416544277.pdfIn PDF document text
    • https://3d5b2cfc-74f5-4c02-8466-0d369b02955c.filesusr.com/ugd/69b86f_63828145a0524bbf9bc5591b51e0aa1a.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_b51578f99dda4848ba78c2830b326142.pdf?index=trueIn PDF document text
    • http://towidono.rf.gd/how_many_calories_in_a_medium_iced_mocha_coffee_from_dunkin_donuts.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_off0000feda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5216 bytes
SHA-256: e1bf3a41713a9804db8031237a87056b71d875677811bd2d77ba56cf854a36e4
font_01_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 10700 bytes
SHA-256: 3db411e04bdd962ce76c30c5230ebf6bb993a4256d15a39bcecc91d644f94012

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