Malicious PDF — malware analysis report

Static analysis result for SHA-256 205d2d4009828886…

MALICIOUS

PDF

78.1 KB Created: 2021-04-06 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 145d729a9e46c594350932a9989f8962 SHA-1: f8942f6eb86b6ae9e7e7f23885f1d87af08937c6 SHA-256: 205d2d4009828886b791b050a40f0855df4a9635059ac17acb373a430f8b580e
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 numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains keywords related to 'Android auto apple carplay', likely a lure to entice users to click on the malicious links.

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://nipisod.ru/123?utm_term=android+auto+apple+carplay PDF link annotation
    • http://storeyou.store/best_uk_rap_albums_20202mt3d.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/90hcFuI/lock_screen_wallpaper_iphone_4s.pdfIn PDF document text
    • http://lighttravel-ng.com/respiracion_aerobia_y_anaerobia_cual_es_mas_eficienter3z3v.pdfIn PDF document text
    • http://localdesign.me/48874270458egtfr.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/dexumawikelewbl6v4.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/1hrib5g/probability_theory_and_examples_solutions_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/tavevalurov/PdVTji9/gazulijeginerewazebunoxim.pdfIn PDF document text
    • https://cdn.sqhk.co/kofisosiz/tnjfWlR/4_pics_puzzle_guess_1_word_level_45.pdfIn PDF document text
    • http://monogawuw.iblogger.org/baxebirebaxel.pdfIn PDF document text
    • http://youralteragoods.com/saracens_fixture_listm8fut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajoran.rf.gd/breviaire_catholique.pdfIn PDF document text
    • http://natikopudidupex.epizy.com/1_to_1000_number_chart.pdfIn PDF document text
    • http://lizixubo.epizy.com/80600150847.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_ed9b9b24d44347919990eac272d3d453.pdf?index=trueIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_d6d21a717de0441f930d2656b547a0cd.pdf?index=trueIn PDF document text
    • http://nameduroremasa.epizy.com/strength_of_materials_objective_questions_download.pdfIn PDF document text
    • http://lamerowed.rf.gd/dance_competition_poster_template_psd.pdfIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_73ba35fb80da4ecb993271920e23bb50.pdf?index=trueIn PDF document text
    • http://suwepedufaresi.epizy.com/bahrain_economic_outlook_2020.pdfIn PDF document text
    • http://lavavoju.rf.gd/entrepreneurship_book_for_senior_high_school.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_off0000f357.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF357 4980 bytes
SHA-256: b2fd48fda345174f42bf3348f147c49b2794c09530c64c10cacbb410e49974e5
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 11344 bytes
SHA-256: 8fa1233b97bad620d21d0c9fb96ab3b5adb24d8d44cba08cf40eb0fd81acf6ef

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