Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e7ab7e6af0d8b0…

MALICIOUS

PDF

77.0 KB Created: 2021-03-28 14:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 291e4c5f23c54fc3392c5374c3b927c8 SHA-1: 58fdcc54109a31776287862dbfa3712f8407073c SHA-256: 38e7ab7e6af0d8b04ca7bcbfe0463cd8c0e8aa4fa32ee4cf08efde85ae2e75e3
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=adobe+flash+player+11+apk+for+android+4.3 PDF link annotation
    • https://cdn.sqhk.co/fukefipemuw/ijjq2hi/apply_for_south_african_defence_force.pdfIn PDF document text
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/32901ea2.pdfIn PDF document text
    • https://jusunusimonaka.weebly.com/uploads/1/3/4/7/134717465/pofolotaweke_lutajez.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/bTbUKii/android_slot_games_that_don_t_require_internet.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/fT2vX0v/37777699474.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dHzwsC3/vuzuselijabibotarokikoxo.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/tuzademeginetiteto.pdfIn PDF document text
    • https://benejawu.weebly.com/uploads/1/3/4/1/134131543/8723797.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/gi3WBhg/malumutinipineju.pdfIn PDF document text
    • http://migunovaj.iblogger.org/healing_back_pain_free.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/jjgeidt/soxifebimu.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/ig5gizK/ice_hockey_liga_pro_results.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuluni/aKfEQPS/fefidiwutaniximenuku.pdfIn PDF document text
    • https://cdn.sqhk.co/razanifuwuz/Sbfjhjb/vedanebigegafaxexavaxena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terudobikemep.rf.gd/monopoly_rules_on_rolling_doubles.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/annual_return_form_27_under_factories_act.pdfIn PDF document text
    • http://felepukagerek.epizy.com/44823763855.pdfIn PDF document text
    • http://totawuvibewe.rf.gd/how_to_dismantle_dyson_dc39.pdfIn PDF document text
    • http://fabebosuvolilu.epizy.com/75199639104.pdfIn PDF document text
    • http://laxizal.epizy.com/bts_bbmas_2019_performance_watch.pdfIn PDF document text
    • http://tokofelutuj.epizy.com/sizivivulibazova.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_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 5760 bytes
SHA-256: 5331a2c06bf64ce883e887080ea37668f9dd72f8be0b60f45ffea954435f6cbe
font_01_sfnt_off00010156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10156 11040 bytes
SHA-256: 51e8d0d59f2d9e9837dbbe021301c651eaf9f93e3f810074ab0d578c9108a8fb

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