Malicious PDF — malware analysis report

Static analysis result for SHA-256 84824edf0f6a1c75…

MALICIOUS

PDF

71.7 KB Created: 2021-03-21 21:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 083c8addf63f550daf9060fb7868f822 SHA-1: 50447dcad311d9635f0b853f9f3416eae2ae1657 SHA-256: 84824edf0f6a1c75079f4479295f53e677a6fa539155323f8c60fb3def535340
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 0.9996

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://dafemum.ru/wix?keyword=5e+character+creation+flowchart PDF link annotation
    • http://rotawafuwuno.scienceontheweb.net/organic_chem_functional_groups.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/behavioral_interview_questions_with_answers.pdfIn PDF document text
    • http://lupaper.22web.org/pisuzanumenovuzapef.pdfIn PDF document text
    • http://faketikus.22web.org/ebay_store_design_templates_free.pdfIn PDF document text
    • http://zopetiwan.22web.org/53044122179.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/46246104677.pdfIn PDF document text
    • http://wikexulefusopa.iblogger.org/is_angelcare_monitor_worth_it.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/75234098581.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_29e0a0c6d6bb44a4a130a692fa3f772f.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_69154707dab04555858b6d9e7fb9a532.pdf?index=trueIn PDF document text
    • http://vutafinaragod.rf.gd/559873323.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/35371081994.pdfIn PDF document text
    • http://zulolabopel.myartsonline.com/adverbs_position_exercises.pdfIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_3b75bb37af4c4260ac35368da52814fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/angularjs_directive_template_call_controller_function.pdfIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_6b61759498aa449487f0347e3bb83b80.pdf?index=trueIn PDF document text
    • http://petifogowiga.epizy.com/jakavetite.pdfIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_2eb48f4c8b084cde8b43c1c235aa791f.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_c8af3b3807da4003a5a7d6c986d57166.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/rapadawonedavovasetanubos.pdfIn PDF document text
    • https://f7b0ef4b-317e-4f07-901b-4de91a029b50.filesusr.com/ugd/50f142_e5a8d5984ff04ba191b73fbc4af9cafc.pdf?index=trueIn PDF document text
    • http://lenigabemez.epizy.com/cs_lewis_miracles_free.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_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 4912 bytes
SHA-256: 957d1ffdceb80ffad2bfe0a4754529b51ada799067083039538cf7d2e4285f4d
font_01_sfnt_off0000ebeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEB 10976 bytes
SHA-256: 90945e86e8d4868e9c48adda937b45b03090d346073b5cb6d39c2b2714576d84

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