Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd07486a2fcabef0…

MALICIOUS

PDF

73.7 KB Created: 2021-02-12 04:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dd0752cdf852ffe6f22ebae91df9e99c SHA-1: fdb5739444049852896f5fb81ab57a830d90375b SHA-256: bd07486a2fcabef0ab12e744935edd43dcb67121dccf12d7690f409b9f427067
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the nature of the embedded links suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=eso+writ+quartermaster+morrowind PDF link annotation
    • http://qwert-ita.fun/fitbit_charge_hr_101_manualhg9gb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481166/normal_600f16a22cc8f.pdfIn PDF document text
    • http://nextauto02.ru/17700356892681ry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404983/normal_60065e07b0908.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/27186647708857mx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464056/normal_6001d1e02eb40.pdfIn PDF document text
    • http://gijixig.22web.org/nunejamimobozerogolo.pdfIn PDF document text
    • http://intekzafast.online/risonazaxuboxoxefuwumoa42kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_601179d359edc.pdfIn PDF document text
    • http://idealslimitaly-official.site/finding_asymptotes_of_rational_functionss0csy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nugafafekovad.epizy.com/grace_united_reformed_church_barrie.pdfIn PDF document text
    • http://litopuputorer.rf.gd/92176149455.pdfIn PDF document text
    • http://nenenadixipuso.rf.gd/farewell_to_arms_guide_gungeon.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/belen.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/39745747739.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/acrobat_pro_dc_subscription.pdfIn PDF document text
    • http://gitipezusev.rf.gd/battle_for_azeroth_soundtrack.pdfIn PDF document text
    • http://pivujumurabaf.epizy.com/cinema_apk_2018_android.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_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 5112 bytes
SHA-256: 2692173e96a302843ed6e78c0e48829fbf7162b903187e7f87729e72a8800b04
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 10484 bytes
SHA-256: d4a0362f0b1460ae2c7f4abae2d788df801daf6a65fffe1c80b0e5672f92275a

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