Malicious PDF — malware analysis report

Static analysis result for SHA-256 34506cab79469f04…

MALICIOUS

PDF

81.7 KB Created: 2021-04-25 02:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad19ae9471d888f4e56b0bc56579715e SHA-1: 2c9c24e7f5dde8406ac072ae986a0eecea66e767 SHA-256: 34506cab79469f0492629959a234ab4c30204d82bd5305c72fd9a0fb2c2a3500
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+work+a+hamilton+beach+iron
    • http://about-central.com/75313527200lulb7.pdf
    • http://filemarker.store/391411200653mtvq.pdf
    • http://haifaiv.ru/how_to_clean_torque_converter_solenoidsa4tm.pdf
    • http://bestunew.xyz/biwidcvysb.pdf
    • http://shopwithsale.website/monikogerunaxofdn6z.pdf
    • http://kunozoxutokusu.mygamesonline.org/manual_formulas_excel_2020.pdf
    • http://kojazunupetip.mygamesonline.org/goodwill_near_me.pdf
    • http://losqutoq.online/carroll_county_arkansas_jail_reportw23qp.pdf
    • http://mutodute.22web.org/buy_bed_sheets_melbourne.pdf
    • http://avto-trokot.xyz/livre_recette_robot_patissier4ahgz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://temomuduzuba.epizy.com/magisterium_5_espaol_descargar_gratis.pdf
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_89541055606c479eb7063848b3d68210.pdf?index=true
    • http://puribobelumisi.rf.gd/assamese_news_paper_download.pdf
    • http://furularotomapu.epizy.com/hc_sr04_ultrasonic_sensor.pdf
    • http://sutexuvidag.myartsonline.com/card_games_for_2.pdf
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_bccdeef213284b1c9f72916be3c03a13.pdf?index=true
    • https://9dc8676a-0e58-44ee-a512-e339c7094702.filesusr.com/ugd/7c0652_cda937ce6dad44a2b9b1feac35aa2706.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4340a843-c208-4564-92d3-2d5a4867f07d/2018_forester_xt_reliability.pdf
    • http://nisalufurawe.epizy.com/bizuwomubasa.pdf
    • https://uploads.strikinglycdn.com/files/796df0fc-d609-4988-9dcf-fa480a727f82/92541988547.pdf
    • http://pezamax.myartsonline.com/larixalejijijolozugemiven.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010005.bin
9fd7273f59e76061abcaf85d705bf6554e229ab0bd44d0504a38d3adc29bcb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 5116 bytes
font_01_sfnt_off00011155.bin
e1d02884a489ca36df293442c7e1c808ae2dfb5b6c530e1029b66117eaf66f21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11155 11440 bytes

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