Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02f594d329d1cb7…

MALICIOUS

PDF

83.4 KB Created: 2021-02-16 05:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 19124b1a5e202f35baebd7ccf7659e1f SHA-1: 5dd2c64f387c354174642ff952932afcaa30ce2e SHA-256: b02f594d329d1cb7b5f1b4d9c0365225a74284d8fdcf6e1a84c55a496a4485cb
126 Risk Score

Malware Insights

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

The sample was detected by multiple heuristics, including ML classification and ClamAV, as malicious. It contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The embedded URLs suggest the primary function is to redirect users to malicious sites.

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://leonvi.ru/strik?utm_term=what+effect+will+the+increased+stimulus+intensity PDF link annotation
    • http://zuvels.xyz/73060092585ml8eu.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/rig5gck/jiwasewukotezerezuluwat.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/287320.pdfIn PDF document text
    • https://mofafodoler.weebly.com/uploads/1/3/0/8/130874416/a7dfd224ce616a.pdfIn PDF document text
    • http://ketorebagibof.22web.org/rexiv.pdfIn PDF document text
    • http://jukekelexoseda.22web.org/6578620792.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/2B5jigj/8352305940.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/Cljbhd4/switch_me_change_your_colors.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/fapajarizowumegedesutsscw.pdfIn PDF document text
    • https://damanula.weebly.com/uploads/1/3/1/8/131856109/937488.pdfIn PDF document text
    • http://simultaneously.space/zokiponegelofakuwapocd.pdfIn PDF document text
    • https://doxorovovo.weebly.com/uploads/1/3/4/4/134479089/tinigerepiwosis.pdfIn PDF document text
    • http://jobware.pro/army_song_video_hdyaarp1a7m.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/ficRmhd/jiruzubof.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
    • http://kovoxajinuf.epizy.com/texezixenorodosajiwed.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/51311489413.pdfIn PDF document text
    • http://gedonisezif.epizy.com/73324334134.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_off0000e3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C5 5240 bytes
SHA-256: 3f2f86c4c5a75c9179b8c362d92f2f7910c81478555bfb924ddee0cf98c216e2
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 11836 bytes
SHA-256: ec4da48ca5678e4f06d5d3e69bde2cfe54d0d1dcf992824aff837b06b7e18bc1
font_02_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off0001317b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1317B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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