Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b293ddcfa459543…

MALICIOUS

PDF

107.9 KB Created: 2021-03-25 03:45:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 260b3a810972a2ea5bf13c8f99f98f1f SHA-1: 77c6bfd59113db3dc4d26ca534c4491d8a484c93 SHA-256: 3b293ddcfa4595437043d0ced5a80184c195fab043db3d7c755d7786bc5dcec1
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The presence of numerous external URIs, including one pointing to 'botokaw.ru', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic findings strongly imply malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://botokaw.ru/award?keyword=materi+belajar+bahasa+inggris+pdf PDF link annotation
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/216600b2759d2.pdfIn PDF document text
    • https://zavexirated.weebly.com/uploads/1/3/2/6/132695663/2852565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476148/normal_5feb3ded4b8e7.pdfIn PDF document text
    • http://zawugudumi.getenjoyment.net/67019172425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_605b0cd3adf5d.pdfIn PDF document text
    • https://davanowaxisipu.weebly.com/uploads/1/3/5/3/135318110/gujoruzudapul-gexemotazoseba.pdfIn PDF document text
    • https://tiramanab.weebly.com/uploads/1/3/1/8/131856622/6261621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_5fd83bd7dae4c.pdfIn PDF document text
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/raxawofapitina-tisixinobeb-vubilozefuzo-sajixerov.pdfIn PDF document text
    • http://pewodebepefawi.scienceontheweb.net/arihant_encyclopedia_of_general_science_book.pdfIn PDF document text
    • http://kalukoroduro.mygamesonline.org/adjectif_pithte_et_attribut_exercices.pdfIn PDF document text
    • https://xufaparada.weebly.com/uploads/1/3/4/0/134017939/xamuje.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/artificial_neural_network_thesis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_604bc493e8088.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/64003.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/applied_economics_k12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5fe4ffde083c8.pdfIn PDF document text
    • http://fofumumitem.medianewsonline.com/brocade_san_switch_commands.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/bandmusicpdf_library_inc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/81486762494.pdfIn PDF document text
    • http://xawiwevivuzox.onlinewebshop.net/mekakomaj.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/upload_and_speed_the_same.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/gofobirebenemobilusipi.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/learn_carnatic_music_in_tamil.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001229a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1229A 5524 bytes
SHA-256: 2efd86738d9018d4dc3c4ba754238eae0afdfbb0c245651350c088f08e99c319
font_01_sfnt_off00013562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13562 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off000140c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C5 11692 bytes
SHA-256: aa9e043e1813b8453e05f149f0ca3c6c118e228bd3744a538820c32df678a36b
font_03_sfnt_off000166ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166EF 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1
font_04_sfnt_off00017c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C48 12152 bytes
SHA-256: f6a7eed25549249a805f8de065c17afb214d5ce6ab3ac5539a87927f2573433f

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