Malicious PDF — malware analysis report

Static analysis result for SHA-256 272ef5cd87c19f11…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 23:11:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ae83899ea93aa9229570203f167b9f SHA-1: 93b3d53b68e675c0f7be8d36812e3b431374efab SHA-256: 272ef5cd87c19f118d7b8f08f85610cfcf50b22ae0f3e616e7ed4e8d7f2c19b8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://xezojetit.ru/strik?utm_term=how+to+thread+a+bobbin+kenmore+12+stitch', suggests a lure related to common search queries. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=how+to+thread+a+bobbin+kenmore+12+stitch
    • https://cdn.sqhk.co/fezifenax/Zvwrgjc/waxezavejamewejaxiru.pdf
    • https://wugumelejemumaj.weebly.com/uploads/1/3/5/3/135324079/rafafakipo.pdf
    • https://cdn.sqhk.co/girolivudafo/FgdZIif/34189882245.pdf
    • https://cdn.sqhk.co/bugininaxi/iaAjhic/aliens_drive_me_crazy_2_download.pdf
    • https://cdn.sqhk.co/bivuwusim/ja5oMi2/plant_and_animal_cells_diagram_quiz.pdf
    • https://cdn.sqhk.co/mevazasid/ehbhfhe/ivanka_trump_instagram.pdf
    • https://ludalobupum.weebly.com/uploads/1/3/4/5/134528654/vafepu.pdf
    • https://cdn.sqhk.co/feketukadoz/jSctJgj/jejugeraxejo.pdf
    • https://cdn.sqhk.co/lubometusoz/cj2gjCC/jazawugajuk.pdf
    • https://cdn.sqhk.co/kuxaroposa/Kwiiic4/fibulesino.pdf
    • https://cdn.sqhk.co/ranemagesoga/hrjjXii/strange_situation_experiment_results.pdf
    • https://cdn.sqhk.co/kigoxeni/abMjbfW/robepesopu.pdf
    • https://cdn.sqhk.co/tevunufoba/Zggighg/arizona_shooting_hotel.pdf
    • https://cdn.sqhk.co/xorunase/2oiaxyr/cat_squeaks_when_jumping_down.pdf
    • https://cdn.sqhk.co/suwapipejob/bUhagiu/marketplace_phone_number_for_insurance.pdf
    • https://cdn.sqhk.co/nexasolonit/bgilqOx/61677895833.pdf
    • https://cdn.sqhk.co/fopajuxalaso/iajbibv/pawabowilenirawav.pdf
    • https://cdn.sqhk.co/gopilufifeda/gheBeOq/lexia_reading_core5_uk_login.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wurivuve/13845052905.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c8.bin
982a94a5b615083c9a2ce6e9538ad3d2aa5f09bd06208772c96847dd10f2b855		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C8 5376 bytes
font_01_sfnt_off0000f8f1.bin
ff56b93ebf34d89a7f00d7e595e128ed5494e1541e32b4ea99476a612ab61c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F1 10904 bytes
font_02_sfnt_off00011e3b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.