Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebe6777c4899e0f…

MALICIOUS

PDF

86.2 KB Created: 2021-02-16 05:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2f2c722f4f698e07a15322bbd2fd3d81 SHA-1: 71ea810e0b4b1c89016db8c30d290ab677641b65 SHA-256: 3ebe6777c4899e0fbdfbd1b8ce2ba5a79d0f8f5fc805e9cc50463d107a034cab
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users 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://leonvi.ru/wix?keyword=swtor+marauder+guide+2019 PDF link annotation
    • http://ritikutoxukor.22web.org/tepobojabixoveserujo.pdfIn PDF document text
    • http://getveran.site/final_fantasy_xv_strategy_guide_download0svnu.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/ff02fcba2.pdfIn PDF document text
    • http://itayoga.space/feral_movie_parents_guide875ud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_60299fbe8967f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_601df7e6516d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369190/normal_5fc797eeece21.pdfIn PDF document text
    • http://jakor.pro/the_rosie_effect_summaryuywh5.pdfIn PDF document text
    • http://cloudmarket.website/zatitabonojuradixekeliay6p9.pdfIn PDF document text
    • http://dujepewowi.22web.org/anatomy_bd_chaurasia_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_6000bacf8beef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ffc472ee41d5.pdfIn PDF document text
    • http://buytoday.cc/zufigudajatqyjzk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_5fd5f3644d1d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/vapokuzodid.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/pipor.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/hotel_california_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/starry_night_mamamoo_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/falcon_7x_spec_sheet.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_off00011431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11431 5612 bytes
SHA-256: 4741e106fe81f507719792f9f22570477f9b9958a0e78ef30d3bea9d4cea4e03
font_01_sfnt_off00012741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12741 10752 bytes
SHA-256: d0f5eb7725e4103aed14eecfdb00acdb045bebb456e1f94d5ffb62843ddf692e

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