Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ea1dbc6460acf6…

MALICIOUS

PDF

72.2 KB Created: 2021-03-29 05:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: df653ad193b546e2c645dd6e832077a1 SHA-1: e782ed10c8776e6930d1e994caafaf237384909e SHA-256: 12ea1dbc6460acf65a0d3816b18cbc4c9d623d3be8451bb2fef1e55f591be372
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to be a disguised lab manual, a common pretext for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://maypoin.ru/award?keyword=amplitude+modulation+and+demodulation+lab+manual+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481273/normal_600899f5085ea.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/ggjhbwb/tefane.pdfIn PDF document text
    • http://yoganchik.space/dotoziketenojvohu4.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/bhbsjgn/best_hits_ac_dc.pdfIn PDF document text
    • https://japapetokanov.weebly.com/uploads/1/3/1/4/131454126/3014231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500201/normal_5fd236ef416c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_601e37839aad4.pdfIn PDF document text
    • http://trells.space/2977445181059fsx.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/tupifek.pdfIn PDF document text
    • http://zoom-omsk.ru/farulekomitononagiveligt6jb.pdfIn PDF document text
    • https://tulelamesesixe.weebly.com/uploads/1/3/5/3/135321102/fanibepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_604a01fdb504a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_60607ea71c4c3.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/N5o5xih/vusulab.pdfIn PDF document text
    • https://pagununida.weebly.com/uploads/1/3/4/8/134861868/josujejera-jisibokore-ruzuwi-zoluxus.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/h6gejds/tripp_trapp_tray_ohne_baby_set.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/28a8293f-ff28-4a26-a609-1258366227ff/precio_de_instalacion_de_gas_natural_vehicular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1faf8f-9494-4a62-9ae6-3df7b03b66c9/perepanolizekapaxuvobiw.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_off0000cc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 4924 bytes
SHA-256: df972b368cb27987754b0ce7a3d68ede6d3444e5dfa858d4ab32ed4530dbf3df
font_01_sfnt_off0000dcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAC 11808 bytes
SHA-256: cf06c9907eca29507c6ba8d739df62b9f08c490f875b5596ad9147ebdba37e51
font_02_sfnt_off0001053f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053F 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.