Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d6dfa25be8e4c2…

MALICIOUS

PDF

71.2 KB Created: 2021-03-19 03:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6f4853ada761cfe83b6e69cbe87bcac4 SHA-1: 8b4a8f3ae5319a72c2345ac215aa171789a8e243 SHA-256: 39d6dfa25be8e4c2dedbda10c0b30a0f2d3ea8e3507145c1d102f3312cb7ba45
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or link-farming operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://soxebez.ru/wix?keyword=charles+law+worksheet+answers PDF link annotation
    • http://tesocoin.online/brother_mfc-j615w_does_not_print2iruj.pdfIn PDF document text
    • http://curvepreloved.com/hidden_objects_3d_diorama_puzzlesbmmdm.pdfIn PDF document text
    • http://teksalon.xyz/20278030110voxs0.pdfIn PDF document text
    • http://leopolds.space/song_behka_na_parey_hut_lovev77ue.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/luwifuwas.pdfIn PDF document text
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/gijiveganiju-lixiteruduz-kixukinotafe-wovobekaxug.pdfIn PDF document text
    • http://fitness1.space/lipeduxijida8duz5.pdfIn PDF document text
    • http://usecabinets.xyz/rs3_familiarisation_guidepehuv.pdfIn PDF document text
    • http://sendgrid-de.com/jurugiximovuderikajokufxbmuf.pdfIn PDF document text
    • https://taponoranasigem.weebly.com/uploads/1/3/4/6/134643922/3c0411d8284996.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/PgjhjaG/dynasty_owner_rankings.pdfIn PDF document text
    • http://eroganoficial.site/easy_rock_songs_for_electric_guitar_beginnersx2in0.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/OYiQjhF/tezepapewafovunase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d952d96-e660-493c-b4a9-d902defc369e/pufasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0274a3-0c3b-40f4-af17-ea29e1717863/bebagokavekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df17497-4916-40f7-9e25-679bd686b131/xovoxudima.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CF 4836 bytes
SHA-256: 351768c21486972b8c899b0fadd5131d82faee2e968322b192df3bb06ad507fc
font_01_sfnt_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 10844 bytes
SHA-256: 0d78b66873cc8ebeb858e471a4e1cf6ffca1b31ece07b4d5899b3c6b76334d14

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