Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bf1b6d60eb4dda…

MALICIOUS

PDF

76.9 KB Created: 2021-06-06 14:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c17322ccee63f87c233f2391f1c475ff SHA-1: df254f292b43f8d5754a8f9a15c3a11a71621566 SHA-256: 72bf1b6d60eb4dda565e188548f3961910cfc04f0d5a60aa4c53923c7adfb54c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://huntic.ru/pbw?utm_term=how+to+update+vivo PDF link annotation
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/tidesikunipobu-pimiduvomojewex.pdfIn PDF document text
    • https://jizawabule.weebly.com/uploads/1/3/5/9/135966138/4674707.pdfIn PDF document text
    • https://pogivigewe.weebly.com/uploads/1/3/1/4/131438874/edaa8.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/98f053a874bf49.pdfIn PDF document text
    • https://kevefavovedejot.weebly.com/uploads/1/3/4/7/134719756/fagomixubuditopiza.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/zorow_garirabaramu_zakur_zotutafet.pdfIn PDF document text
    • https://nitesefoxon.weebly.com/uploads/1/3/1/4/131453907/zukimekotiwafo_banadojomozola_nanamufekunel_suxisi.pdfIn PDF document text
    • https://bemewewoz.weebly.com/uploads/1/3/4/6/134639120/3957797.pdfIn PDF document text
    • https://moxeguzivega.weebly.com/uploads/1/3/5/9/135965209/e830ac1258bf54e.pdfIn PDF document text
    • https://rojobasexadef.weebly.com/uploads/1/3/2/7/132711954/bafegevev_mafota_kigepukevixu_minoperoxikaba.pdfIn PDF document text
    • https://zunazodofi.weebly.com/uploads/1/3/4/6/134636935/xusurid.pdfIn PDF document text
    • https://wezukanedipewor.weebly.com/uploads/1/3/4/6/134602888/wawajenoxepus-sixifurorusixul-meromivox-gesolebama.pdfIn PDF document text
    • https://wifirinopemuv.weebly.com/uploads/1/3/4/7/134762260/zixojituja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitixofipoxu.pbworks.com/w/file/fetch/144611118/pawukasoviw.pdfIn PDF document text
    • http://felinemumivu.pbworks.com/f/cdg_karaoke_player_download.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/f/wopesixalusa.pdfIn PDF document text
    • http://mikabipi.pbworks.com/w/file/fetch/144577791/best_firmware_for_tm-ac1900.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/f/how_to_cite_a_mla_example.pdfIn PDF document text
    • http://rukutuxeriro.pbworks.com/w/file/fetch/144580827/72306009427.pdfIn PDF document text
    • http://midevodimu.pbworks.com/f/how_to_say_please_find_attached_in_german.pdfIn PDF document text
    • http://pebolokunaz.pbworks.com/f/how_to_prepare_dextrose_powder_for_dogs.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/cognitive_behavioral_therapy_for_dummies_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AE 4760 bytes
SHA-256: fdd8b4aeee09ea7f602175a4470f52a1e07714735d42fe7adcd80944704326fb
font_01_sfnt_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 1936 bytes
SHA-256: a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301
font_02_sfnt_off0000ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF44 11392 bytes
SHA-256: 453a01033f2e3db6a836aadde99756af69f5b4ac52e5b1d6e40857b65ad5effe