Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b34a2e95ef4311…

MALICIOUS

PDF

76.8 KB Created: 2021-02-25 05:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a1d92670a26ac8abf60894191c688d61 SHA-1: 130e5b92fa98e8be41be2dcabc667e4fd66680cd SHA-256: 27b34a2e95ef43116819d070deaa0712b9c54495b3a95bf2364404302d1d3aac
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating it's likely a phishing or SEO spam lure. The document body contains a question and embedded URLs, suggesting an attempt to drive traffic to malicious sites. The presence of numerous external links, including a link farm, further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://baarspo.ru/strik?utm_term=what+is+the+synonym+of+lethargy PDF link annotation
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/78c229cd8b2.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/ziwizojegapijam.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/fanewasidokesupep.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/list_of_emotions_for_speech_therapy.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/65556906770.pdfIn PDF document text
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/tejavuden-bivapizi-tifokavevigu.pdfIn PDF document text
    • http://rilomenininun.getenjoyment.net/47671460629.pdfIn PDF document text
    • https://vujexuxifu.weebly.com/uploads/1/3/0/7/130739824/wonataxototuwale.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/do_electric_dog_fences_work_for_german_shepherds.pdfIn PDF document text
    • http://nivekux.iblogger.org/what_are_the_basic_interview_questions_for_freshers.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/how_to_remove_breech_plug_from_thompson_center_encore_pro_hunter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/kiligadapejune.pdfIn PDF document text
    • http://litorow.myartsonline.com/razor_e200s_scooter.pdfIn PDF document text
    • http://medozazi.epizy.com/pupisix.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/tizemixawafisiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/bhagwa_rang_dj_ringtone_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/90469251535.pdfIn PDF document text
    • http://roginopirut.epizy.com/naruto_tabletop_rpg.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/introduce_yourself_in_interview_for_freshers.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/secret_santa_wish_list_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/37568047214.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/suddenlink_report_outage_phone_number.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_off0000edc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC6 5296 bytes
SHA-256: b82a7871da88ad200ce0a8efb1617763dd1b93c031948909d14cbb783ce7148c
font_01_sfnt_off0000ffb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB5 11296 bytes
SHA-256: f968a9f46c06197bfb0ce7ea44306d2c866daae8e40112f2dabb0f9a0e8cee51

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