Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1bbea60a5b4ac7…

MALICIOUS

PDF

80.8 KB Created: 2021-03-21 00:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bdedadf973855931e68275a3b493d79d SHA-1: 9e01c1d9e0d18c7f8052276adc34f3a89d2dce01 SHA-256: 8f1bbea60a5b4ac731765b892e6689b269d0ed8794a6ab9716899d2a30622953
156 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 0.9994

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 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.
  • 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://fokemale.ru/strik?utm_term=escuela+psicologia+conductista PDF link annotation
    • http://fatukawudel.iblogger.org/watizodipegatobiniluzowi.pdfIn PDF document text
    • http://towajemikof.iblogger.org/repadijofis.pdfIn PDF document text
    • http://vivuvulefova.iblogger.org/40734377814.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://baxodivol.rf.gd/leveling_guide_vanilla_troll.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_c1c713ec1a8b48c1a6b47e56c125c8a1.pdf?index=trueIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_a643936a09894950ace0ae68636d6491.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/dojutosurarire.pdfIn PDF document text
    • http://xulitapaxi.rf.gd/safety_not_guaranteed_movie_ending.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/77741365933.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/puzupu.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/23801302367.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/xactimate_mobile_user_guide.pdfIn PDF document text
    • http://xatabiraluxuded.rf.gd/cccti_transcript_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/foxit_reader_portable_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/17725377277.pdfIn PDF document text
    • http://jijalikutigo.epizy.com/perec_life_a_users_manual.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/compound_words_worksheet_for_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/gojizab.pdfIn PDF document text
    • http://gejiregi.rf.gd/zasum.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/zigudekewekarakov.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/tesanakolapiwutasuzi.pdfIn PDF document text
    • http://xolemobubusosi.rf.gd/lake_michigan_fishing_report_wi_dnr.pdfIn PDF document text
    • http://tuninedup.epizy.com/oklahoma_drivers_license_renewal_cost_2020.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_off0000fc40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC40 5100 bytes
SHA-256: 09b495ed87e06e739a746ebd56f0bbe6b51f422d2b1ab9b84d371f919bb719f2
font_01_sfnt_off00010db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB3 12000 bytes
SHA-256: 43a77d6b4205bab3c0807d1ea22930463ef78a23446dfbd82e0fd47fa1edb521

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