Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f74e706f3b88df…

MALICIOUS

PDF

63.6 KB Created: 2021-02-21 03:44:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec3867b2adc1441d746e925175911a99 SHA-1: 365cf3707f87d1ca921ddf05c3e29ed495c1343f SHA-256: 15f74e706f3b88dfa0782048e7448c624e2438f2e2fd3ba5eecada93e7c22312
184 Risk Score

Malware Insights

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

The PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8602

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.
  • 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
  • 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://leonvi.ru/strik?utm_term=outdoor+group+games+with+no+equipment PDF link annotation
    • https://pesenulowujef.weebly.com/uploads/1/3/5/3/135325158/8746541.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/jeh5wjb/yes_that_dress_mod_apk_1._0._8.pdfIn PDF document text
    • https://cdn.sqhk.co/nizekidido/hjhs81O/fire_and_water_signs_of_the_zodiac.pdfIn PDF document text
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/f95cefbd174fb.pdfIn PDF document text
    • https://sijokazodile.weebly.com/uploads/1/3/1/4/131454207/jevajefinite.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/gi2Mm48/monster_vs_zombies_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/iHieSuI/security_camera_mod_unturned.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/kutaforunapov.pdfIn PDF document text
    • http://mimamiva.iblogger.org/amar_chitra_katha_bengali_free.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/4cba074afa6.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/bnekIji/free_tiktok_followers_without_human_verification_2020.pdfIn PDF document text
    • https://legoxadev.weebly.com/uploads/1/3/2/3/132302888/bujamaxukakosizobenu.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/pigupasabasime_xexod_nadenelewupujo_sisute.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/lilesig_ruzofusevurate_fevito.pdfIn PDF document text
    • https://fofawuparojimi.weebly.com/uploads/1/3/1/0/131070926/90cee363f4a04c.pdfIn PDF document text
    • https://natugivekoxatan.weebly.com/uploads/1/3/1/3/131380011/7ff6acaa0ffb363.pdfIn PDF document text
    • http://vududodudo.22web.org/all_new_odia_album_video_song.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/dejazuvorira/63375144538.pdfIn PDF document text
    • http://buwanizun.epizy.com/rovisusajedet.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B1 5468 bytes
SHA-256: b1b11b2d626883f60b5d404720ea1008a09e80d479cf30fb4ad5d89682c8401d

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