Malicious PDF — malware analysis report

Static analysis result for SHA-256 4916a4a02ed7c96f…

MALICIOUS

PDF

73.6 KB Created: 2021-03-13 16:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 432453904d9840990a9b65c00e8e957a SHA-1: eccf68cbc79a2336a62c0e47cb2625c12cc7e736 SHA-256: 4916a4a02ed7c96fe02f6db024ff77755e1b21d2ec408a80888c5096de07fbd8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/aws?utm_term=ver+la+casa+de+los+esp%25C3%25ADritus+pel%25C3%25ADcula+completa+en+espa%25C3%25B1ol+gratis PDF link annotation
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/vatojisuwufatatugiz.pdfIn PDF document text
    • http://sethel.xyz/crock_pot_csc026_instruction_manualku4uq.pdfIn PDF document text
    • http://xivoxuvawet.iblogger.org/aghora_mantra_in_telugu.pdfIn PDF document text
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/pagelej_kuloxeveregog_mijilukaxoz.pdfIn PDF document text
    • http://lifeit.pro/newujujulp49c.pdfIn PDF document text
    • http://stepka2016.xyz/what_is_the_next_nancy_drew_gamezxajh.pdfIn PDF document text
    • http://kudretbozaci.com/machine_learning_mastery_deep_learningc5w4p.pdfIn PDF document text
    • https://gavurefeg.weebly.com/uploads/1/3/1/0/131070452/9373347.pdfIn PDF document text
    • http://nalatakojuzali.iblogger.org/lesesubutu.pdfIn PDF document text
    • https://xisidugaboker.weebly.com/uploads/1/3/4/4/134436298/vovub.pdfIn PDF document text
    • https://pepuxopotu.weebly.com/uploads/1/3/5/3/135390253/sosevukagutab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ximupuv/new_electronics_projects_circuit_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cc21a6-63c5-4f16-922b-1523cae8929e/marshall_dsl40c_schematic.pdfIn PDF document text
    • http://nejesinila.epizy.com/19726991530.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/credit_card_number_generator_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75dc916b-44f0-47a9-9bd8-fa38af780c9c/sifogov.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_3adc4ca683324927bcc5a0da39f845a5.pdf?index=trueIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_ed821b594cb34d9db485ef28553069f3.pdf?index=trueIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_f235b65f742e47d285de4d0ec62fde67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ece994b-987f-4764-9763-6057693b7c30/caterpillar_gp25_forklift_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/36360307759.pdfIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_0eb6647f06b04ff98fce7a4120185607.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxunu/consumer_reports_magazine_october_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01173eaa-9a8f-4f88-a360-7a497449e0a9/graphing_parabolas_in_standard_form_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07a5f17-70f6-4245-9a15-dbab462e1071/xekolazud.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_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 5624 bytes
SHA-256: 10b78f5e2c52f827a015944ff558f15146c2dac76b610aaaeff8d3295cab81dd
font_01_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 11192 bytes
SHA-256: 9edc2afbec6c91adff42359045b117f8ffc8b07943d3c4106bfdca631bdc3064

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