Malicious PDF — malware analysis report

Static analysis result for SHA-256 f712e40b4edbcd65…

MALICIOUS

PDF

86.6 KB Created: 2021-06-01 06:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8e3492b45f62cf4b56f03fb23feb2a4d SHA-1: 26ceda0a994de8a641d485e9b96be0889d8f44d6 SHA-256: f712e40b4edbcd65b5fbd5a8e577b83de9388f82bd36acfd31aabd5354389e71
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified as a potential link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://ketchas.ru/pbw?utm_term=ratib+al+attas+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409796/normal_600e777016691.pdfIn PDF document text
    • https://lemabifi.weebly.com/uploads/1/3/4/3/134319461/148272.pdfIn PDF document text
    • https://nulabelavomeviz.weebly.com/uploads/1/3/1/4/131413951/pivobezamifim.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4402718/normal_60b23ca7b5a71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5fec85b730afb.pdfIn PDF document text
    • https://ludubilataso.weebly.com/uploads/1/3/4/7/134719947/getegepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375350/normal_604cedadf3dc4.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/kejagugeroj-lutuwera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5ff844f1ea97a.pdfIn PDF document text
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/xodidudo.pdfIn PDF document text
    • https://bifutizuwosedi.weebly.com/uploads/1/3/4/6/134645412/vebizaduvax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7202decd-df50-4b0a-9ba5-f9b3b9f64da9/how_to_reset_amana_he_washing_machine.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/86639466064.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/144443529/industrial_revolution_bbc_documentary_worksheet_answers.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144422958/povutonenavuxutip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec6f93e-9b08-4407-aec0-422896eaad16/dewunabirisesijejonofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5027fe0f-1d48-48eb-8aa7-0932a711c320/88841165614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c35c5866-811e-493f-aa98-3c122396c03b/what_is_kundalini_yoga_youtube.pdfIn PDF document text
    • http://togusan.pbworks.com/f/advantages_and_disadvantages_of_non-_probability_sampling_slideshare.pdfIn PDF document text
    • http://bilabegape.pbworks.com/w/file/fetch/144441765/51945902788.pdfIn PDF document text
    • http://zekodunu.pbworks.com/f/present_simple_vs_present_continuous_exercises_advanced_level.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144427788/how_do_you_light_a_pilot_light_on_a_baxi_boiler.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/12822563505.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144441519/41248144676.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144444393/42726486924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a332c81d-6fe6-41a8-9aac-799eb40cc111/englander_pellet_stove_lower_auger_motor.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCB 5060 bytes
SHA-256: fcb6ae0b56c5ad4cc0577663a7deac04f1b18dd8b84db2d4c6251555539c0b3f
font_01_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 11436 bytes
SHA-256: b9b73d7eb74f6dfc532c57025537461ef0a05c8f853bb2be5ea74f91fd3f6af4
font_02_sfnt_off0001262d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262D 16928 bytes
SHA-256: ff36e60e1d18de9ea1bb39457bb54883f7e04aa21460c90ce58bca53c29a2510
font_03_sfnt_off00013e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E40 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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