Malicious PDF — malware analysis report

Static analysis result for SHA-256 67057cbd3fc2eb4c…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 20:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 00d80f27fb1d24f14695385b6fc5881e SHA-1: 490ee185941c3bfea4f16ba56bdc54b80df4536b SHA-256: 67057cbd3fc2eb4c8a0bd090bb5ed0f3dd8bbea3e92e42917441f45403102bf3
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a significant number pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://xezojetit.ru/123?utm_term=missing+411+pdf PDF link annotation
    • http://gavapomapo.22web.org/7_habits_of_a_highly_effective_teenager_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/ICghtV2/3078875130.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/74481037987ax5d5.pdfIn PDF document text
    • http://idslim-italia.site/nano3_ionic_or_covalent_bond614o1.pdfIn PDF document text
    • https://gosawopidelogeb.weebly.com/uploads/1/3/4/7/134714887/5869800.pdfIn PDF document text
    • http://grandov.pro/tusadilosozej4vtfs.pdfIn PDF document text
    • http://scarcebook.com/cuantas_clases_de_razas_humanas_hay_en_el_ecuador4wvnh.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/ijaXCUO/86791383155.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/7540170.pdfIn PDF document text
    • https://mozevosiku.weebly.com/uploads/1/3/3/9/133999333/faviwaliwonix.pdfIn PDF document text
    • https://cdn.sqhk.co/worenora/ifNgf4R/ddpai_mini_wi-_fi_1080p_dash_cam.pdfIn PDF document text
    • http://trastenmyqort.online/bioethics_vaughn_3rd_editionia7jx.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/tGNgcid/meridian_157_chapter_1_elevator.pdfIn PDF document text
    • https://dufibivi.weebly.com/uploads/1/3/5/3/135346242/7179160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_a7485ec506bb476ab594de347aaeb7b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezerawe/gozivesuwuwubutifige.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/dobuwibevupow.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/gundam_rise_from_the_ashes_dreamcast.pdfIn PDF document text
    • http://xolalujodijosox.rf.gd/furolewiruzibonusok.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/adobe_acrobat_reader_x_offline_installer.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/cryptography_and_network_security_lab_manual.pdfIn PDF document text
    • http://falabagilotopor.rf.gd/lectura_de_la_biblia_en_audio_genesis.pdfIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_86effdbb59f948b1b2b93a5e5d806970.pdf?index=trueIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_431cf89327004355b2beb6e2cb3a22c3.pdf?index=trueIn PDF document text
    • http://nijibibikij.rf.gd/47892982451.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/how_to_calculate_the_number_of_moles_of_a_compound.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_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 5016 bytes
SHA-256: 9a8d8f9bab71fd5fe66e23a124f65f334e88eccd65be496d70079b991a66676c
font_01_sfnt_off0001047f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047F 11420 bytes
SHA-256: 2ffdfd667e864949dd734266985d83c5bdb70a2071920ac0b69beab3a7b69a76

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