Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b9efbd1dcc344a…

MALICIOUS

PDF

175.1 KB Created: 2021-03-15 04:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c47282053da5cacc724577c751c4e405 SHA-1: 992712143866290dd2e5c5792fbf2a4f9a04462b SHA-256: 57b9efbd1dcc344a0240fd51249a1087eadbc08bb2119635a80e30355b44ac8a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/award?keyword=kamus+bahasa+jawa+kawi+pdf PDF link annotation
    • https://cdn.sqhk.co/vuvapolaxaj/xcTfAje/rihanna_shot_a_man_down_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/guxudakakali/nhjBjaI/mixed_strategy_math_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/hbibjcW/the_dictator_streaming_fr.pdfIn PDF document text
    • http://kirovafin.iblogger.org/production_of_honey_bee.pdfIn PDF document text
    • http://lurugusop.iblogger.org/nusiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481994/normal_6015ccd27db94.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/foHPARa/mobile_security_antivirus_cracked_apk.pdfIn PDF document text
    • http://dozazexopavo.22web.org/boye_round_loom_directions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ffca2dcc4d1d.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/jhibwii/74813605615.pdfIn PDF document text
    • http://nevepojikita.22web.org/practical_byzantine_fault_tolerance_and_proactive_recovery.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dhcXbxk/zonubutinonogovevemis.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/hjhghei/41299651035.pdfIn PDF document text
    • https://cdn.sqhk.co/gogefaman/1opijRR/small_world_zwiastun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_5fe63f3e2903a.pdfIn PDF document text
    • https://cdn.sqhk.co/rotusorukazi/NFahg8G/kapuxuwomobuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vozuxekeve.rf.gd/74879393915.pdfIn PDF document text
    • http://mimogovudefo.rf.gd/apostrophe_worksheet.pdfIn PDF document text
    • http://durunorutap.epizy.com/kebuvamafanububesuno.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_off00026d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26D14 5492 bytes
SHA-256: a52f318d575882284f03c39231ab007886bb64dbb33d24d6a90355f7b300810e
font_01_sfnt_off00027fb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27FB4 15220 bytes
SHA-256: b557839f3b439062c38f16140e7d5a1684a5431077ba3b8a1abe83b8234368fa

Open this report in the interactive analyzer, or submit your own file for analysis.