Malicious PDF — malware analysis report

Static analysis result for SHA-256 4037e59b6ab94ed4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-24 21:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dd36181db2b7ec7c52e35b9de8ea6e72 SHA-1: 254782f44a0843671ec40c5a2c64fc9529dbf2b7 SHA-256: 4037e59b6ab94ed4237342567d57dc9d361b87b96af88f44871fd7ca1c3d7db0
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, indicating a phishing or redirection attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the overall structure suggest the PDF is designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8763

Heuristics 4

  • 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 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/strik?utm_term=how+many+shows+can+hulu+dvr+record+at+once PDF link annotation
    • http://wabiferofuvud.mygamesonline.org/adobe_camera_raw_9_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/jaPnpjc/56639270547.pdfIn PDF document text
    • http://bujobatibu.22web.org/jozukamuxipa.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Uhaibu4/smoothie_mixer_wmf_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/jegcgcR/biker_mice_from_mars_2006_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/ketalidukepi/jfhbbhb/24259836079.pdfIn PDF document text
    • http://7lessons.website/63352040731hmtyz.pdfIn PDF document text
    • http://medesutaduj.22web.org/zugotizu.pdfIn PDF document text
    • https://cdn.sqhk.co/porifepi/ehieFjR/antibioticos_elsevier.pdfIn PDF document text
    • https://cdn.sqhk.co/xesagomi/iet3tid/89771755132.pdfIn PDF document text
    • http://reduslimer.website/the_clan_of_one_breasted_women_summatiymc.pdfIn PDF document text
    • http://fenellalucynelle.info/wawakq7jhv.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/hmeofSa/college_football_live_scores_cbs.pdfIn PDF document text
    • http://wilitubejibo.iblogger.org/mejirisu.pdfIn PDF document text
    • http://fujubipe.22web.org/87392478692.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beverotunege.epizy.com/nakivesubedexoludal.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/manualidades_con_tubos_de_papel_higienico_flores.pdfIn PDF document text
    • http://nuzikenevizut.onlinewebshop.net/xisenemura.pdfIn PDF document text
    • http://dekifovep.epizy.com/aadat_hai_song_mr_jatt.pdfIn PDF document text
    • http://rufofexejojar.epizy.com/local_tv_guide_denver.pdfIn PDF document text
    • http://juwebud.epizy.com/domakefijolab.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 5392 bytes
SHA-256: 541282ed457deec346f2f43c338cf3e8f670c92e2039844c7d90cf7490be50f9
font_01_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 10768 bytes
SHA-256: d8e05a2e7f2c605990aaa53302f20e9b1884a871e4a152cf8632edeb18046885

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