Malicious PDF — malware analysis report

Static analysis result for SHA-256 593811ddf41e5ff2…

MALICIOUS

PDF

76.4 KB Created: 2021-03-02 17:09:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f89007e4f2c0529f5737111f1f21eb9a SHA-1: f12f8081a443ebe45a4990c6cb01373cc1a3a4ad SHA-256: 593811ddf41e5ff2a05e43f87e69ebe2972275d81570a8582295542cb6842e58
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs is https://resalured.ru/123?utm_term=samsung+grand+prime+price+2020, which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://resalured.ru/123?utm_term=samsung+grand+prime+price+2020 PDF link annotation
    • https://cdn.sqhk.co/zidexamuwela/RghChyy/food_wars_anime_season_5.pdfIn PDF document text
    • https://raralafelu.weebly.com/uploads/1/3/4/4/134476833/9927127.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/gefaxu.pdfIn PDF document text
    • https://febodume.weebly.com/uploads/1/3/2/8/132815732/4c95699db.pdfIn PDF document text
    • https://disefiduwixa.weebly.com/uploads/1/3/5/9/135981448/fonaranupebuwunuz.pdfIn PDF document text
    • https://jurogewogil.weebly.com/uploads/1/3/4/3/134318518/d849c56c6.pdfIn PDF document text
    • https://kevafesituwa.weebly.com/uploads/1/3/4/0/134040773/171ef4e50dca0d.pdfIn PDF document text
    • https://zuwuloju.weebly.com/uploads/1/3/2/6/132681456/mupatuwakom.pdfIn PDF document text
    • https://povurumupun.weebly.com/uploads/1/3/4/8/134884194/2960356.pdfIn PDF document text
    • https://nozirurabi.weebly.com/uploads/1/3/0/7/130738896/gadal-dewagizufeliba.pdfIn PDF document text
    • https://suveruwifofe.weebly.com/uploads/1/3/1/3/131380558/6836310.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/hggiYhf/sun_ez_racer_recumbent_bicycle.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/6141013.pdfIn PDF document text
    • https://vabinori.weebly.com/uploads/1/3/4/3/134348027/pefojad.pdfIn PDF document text
    • https://cdn.sqhk.co/tatonabufule/iBrhiNW/tiktok_download_mac.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/sizawariler.pdfIn PDF document text
    • http://bigonetudukori.iblogger.org/65413931892.pdfIn PDF document text
    • https://makorodes.weebly.com/uploads/1/3/4/8/134859701/leritadexujo.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/lupebesu/b2b_branding_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/fozidabifuxubefigagos.pdfIn PDF document text
    • http://nerebadaguve.epizy.com/total_conquest_mod_apk_android_1_com.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/5442647339.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_off0000ea28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA28 5740 bytes
SHA-256: 1450187d100e52ced18c48672f100dc2f65a833bdb2f7822841953ae59cea45c
font_01_sfnt_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 11316 bytes
SHA-256: 105f80626889bc8e3b141a03b9772727d06312cc1efc5efaa1a4406b80b56db2

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