Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb2a1404f759721…

MALICIOUS

PDF

70.3 KB Created: 2021-02-25 14:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8ee32dc47b309f66978aaadfadb1c98d SHA-1: 0162a1604235c6bd388e720c4d3ea783a2d378f1 SHA-256: dfb2a1404f75972157c5b8b5b004c00623575308b318d651d68d61499a69f54f
124 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

Heuristics 4

  • 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
  • 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://druttle.ru/wb?keyword=20%20poemas%20de%20amor%20y%20una%20cancion%20desesperada%20resumen%20yahoo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417212/normal_6026067ecdea8.pdfIn PDF document text
    • http://naturagrush.space/kajilojesipojisie3eir.pdfIn PDF document text
    • http://brumbum3.xyz/vukexulikisavarezedidarikzz6rt.pdfIn PDF document text
    • http://arm-watch3.club/why_is_the_study_of_economic_history_importantq62q1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_6014dcd45ac31.pdfIn PDF document text
    • http://frankkyko.com/lasojelam9jwto.pdfIn PDF document text
    • http://callup.today/whats_the_difference_between_hopper_2_and_hopper_3a85in.pdfIn PDF document text
    • http://jirafka.space/86093710428515xe.pdfIn PDF document text
    • http://sayfelengs.space/machine_gun_kelly_daughter_20204l1d1.pdfIn PDF document text
    • http://robinmani.site/zong_free_internet_coded7m7r.pdfIn PDF document text
    • http://doporujela.iblogger.org/aerospace_science_and_technology_journal_template.pdfIn PDF document text
    • http://study-english-04.space/patanjali_medicine_for_dysfunctional_uterine_bleedinglnd8h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484154/normal_5fe5c5519887e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fcb1ded1d7d2.pdfIn PDF document text
    • http://nat-fru.space/nobamonajiroo66c9.pdfIn PDF document text
    • http://pop-marketplace.ru/73445739308re3ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sirulumen.rf.gd/75328009185.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/54445804203.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_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 5564 bytes
SHA-256: 773a2b27abf416c6a6d4378613175ad84e1eb1a2be550cd7a39259e40f86af8c