Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ce227ecfd4ef76…

MALICIOUS

PDF

81.5 KB Created: 2021-03-12 17:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec90ccae1736a3abac53279fce07a3c1 SHA-1: 6b6112497b40abdbac05c688a8c38f8244f2c74f SHA-256: c0ce227ecfd4ef76b349f8ba7cbedf1e627cf8b4bb5363d0cc5509942567507f
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 0.9996

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://soxebez.ru/wix?keyword=core+set+2020+prerelease+bundle PDF link annotation
    • http://welutotadaxol.iblogger.org/58731834178.pdfIn PDF document text
    • http://dudisigufazalu.22web.org/assassin_s_creed_2_the_truth_guide.pdfIn PDF document text
    • http://zipotuja.iblogger.org/rock_climber_strength_training_program.pdfIn PDF document text
    • http://ruwegekugite.22web.org/lesusileduxumivakukuk.pdfIn PDF document text
    • http://razokibogoze.iblogger.org/54524155476.pdfIn PDF document text
    • http://besuxiju.22web.org/what_are_the_major_themes_of_african_poetry.pdfIn PDF document text
    • http://diwokaxojizo.iblogger.org/premier_protein_shakes_for_weight_loss_reddit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f4b8d7-11a2-4f49-9b1f-b459ae8a0c43/how_to_put_string_on_a_stihl_fs_90.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_194f0f6eb84c4762bc409ceb249c17b8.pdf?index=trueIn PDF document text
    • http://tuwafexom.epizy.com/psychology_of_learning_noun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e651ee2c-15e5-436e-be82-ab086c870913/50303740709.pdfIn PDF document text
    • http://pexoroxijaseduj.rf.gd/mortgage_hardship_letter_template.pdfIn PDF document text
    • http://pajoxewujovero.rf.gd/difference_between_per_capita_income_and_average_income.pdfIn PDF document text
    • http://nakodazik.rf.gd/how_to_gain_mental_toughness_in_running.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c06efac-91f8-4986-bc4a-d3999e95e74a/nerobegavumipo.pdfIn PDF document text
    • http://baxadozivu.epizy.com/29461910571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0646d631-cf61-45b6-87bf-254ade2ebf1c/18470880613.pdfIn PDF document text
    • http://xejolufu.epizy.com/xebudolonurujisoxidorota.pdfIn PDF document text
    • http://novinijazop.epizy.com/research_ethical_principles.pdfIn PDF document text
    • http://tetigod.rf.gd/nivodekutizijonodov.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_c407715fba2243dda602484eb107dbac.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 3644 bytes
SHA-256: aa5db8558f3ce0c66832709cc25641e87b8135b1d0870047a0d5003879939e71
font_01_sfnt_off000101dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 5272 bytes
SHA-256: baf2e329714df54f5e1f1dcbaf84c0b22e4f9b241bff06ec0f46d7991558b1b5
font_02_sfnt_off000113c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C5 10704 bytes
SHA-256: ae92d5f737e74fcd9a95af1335a094796b81bf178ddd47552bbe38c29abd32e9

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