Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1f8920eb16f848…

MALICIOUS

PDF

84.9 KB Created: 2021-03-16 02:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ff3c34e7f17ae9eb7e9c80fbef64d83f SHA-1: 536008eef9fd83dd3cc27bed470e2f3ed1e78fd0 SHA-256: 9b1f8920eb16f848a9ffa33d130017b560b0205284714b026e3c2464a207367b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=kalphite+king+guide PDF link annotation
    • http://lezobul.medianewsonline.com/free_download_audacity_for_windows_xp_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/jerowerar/U0UhcYW/lenutad.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/what_is_the_purpose_of_a_persuasive_writing.pdfIn PDF document text
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/gejatanujebubiritux.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/nuderamukakevatesopimalu.pdfIn PDF document text
    • http://kizudoluwewomam.iblogger.org/annual_training_plan_template_word.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/gavifasekuparavem.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/TMLgPge/kansas_driver_s_test_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/e5RMic9/tusakolejekevidevi.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/TgdKtji/76666984319.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/7470607.pdfIn PDF document text
    • https://cdn.sqhk.co/wifepodilojo/giiezjd/69016285809.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/vodameverezap-tunin-lajogemenokagas.pdfIn PDF document text
    • https://pumurepuwalor.weebly.com/uploads/1/3/5/9/135978845/dunozuk-vegedidebovenej-xibunurixene-fimimujugit.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/gegididefode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dekefolujif.epizy.com/memizikamoredema.pdfIn PDF document text
    • http://mifazafodig.rf.gd/jupefesavidipidebijadad.pdfIn PDF document text
    • http://nagikesedogoru.rf.gd/92745567553.pdfIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_ce5615679cdd4c36a192f11a1264859c.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_597b2a1d259742c9893f5e172105d34d.pdf?index=trueIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_973ddb4aaf594ac3914c7ecb8ca435da.pdf?index=trueIn PDF document text
    • http://numivonef.rf.gd/o_mundo_do_budismo_tibetano.pdfIn PDF document text
    • http://budakokubogomax.rf.gd/kawozo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 4980 bytes
SHA-256: 479c691fde18c6d0212fbbbd1b905a27c6b8640ef382d908944f0f43cd5fe87a
font_01_sfnt_off00011f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7B 10996 bytes
SHA-256: 68bde8a7c7af14b30d5ee951ba17566775dec9ca2fe198e4bfb1ec9d9d888f8d

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