Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb66bf469d721616…

MALICIOUS

PDF

72.9 KB Created: 2021-03-07 14:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 8cf1acf0a3df1ef87435d5b60bfc45f6 SHA-1: fabd5f18403a07f008b9294bca6d6ddde9e9c7e5 SHA-256: cb66bf469d7216161f7931f33dd24ba991099562056d1979c8660f1c9a377b14
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to an appliance manual, likely intended to trick users into visiting malicious URLs. The presence of embedded JavaScript further supports malicious intent, potentially for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/wix?keyword=general+electric+xl44+oven+manual PDF link annotation
    • http://dusejetiwogodad.getenjoyment.net/48505576428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_5fc94438c1332.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/tedotowarijalimedune.pdfIn PDF document text
    • http://autoport76.online/anger_management_certificate04qob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5ff49956b6339.pdfIn PDF document text
    • https://wamurereleveti.weebly.com/uploads/1/3/5/3/135392703/benosex_vabonazos_funevekinujonuz_pemugobuv.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/bibapegorupejex-wafutum-wugimupufuxig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450259/normal_5fff5b1a956bb.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/jaxubuzebe.pdfIn PDF document text
    • http://datab.vip/62343620196odf8.pdfIn PDF document text
    • http://iglivesupportteam.com/gradle_compile_vs_implementationkpzf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_5fdc3fe5e0514.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/rhchbQF/wubodorefogugebeziloxono.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/charles_dickens_a_christmas_carol_first_edition_value.pdfIn PDF document text
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/4713f3.pdfIn PDF document text
    • http://fbdirect.site/23344097996t9q6a.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/8371793.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/cd6ijib/terraforming_mars_game_trayz_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5fdaeb74cb298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tasokapivodi.epizy.com/cambridge_ielts_6_test_2_reading_answers.pdfIn PDF document text
    • http://beninoduvewer.epizy.com/vuvazojob.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/alpine_cde-w235bt_bluetooth_setup.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_off0000e090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE090 5016 bytes
SHA-256: dcbf1525b20c53d7337065e60f9ce45106590f1ef9bb8117133b7b0be7cd791f
font_01_sfnt_off0000f19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 10820 bytes
SHA-256: f0f7c0b17a690a8364a385a0a2c5da506ba3a10638a457c4aa7fd9ce2dbacf6b

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