Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0694e4e57fed86…

MALICIOUS

PDF

73.6 KB Created: 2021-03-27 15:54:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2904d125a345f3f940fcbb616138c7 SHA-1: 084f1ce37a43d5628035caed3565adb9beb379e5 SHA-256: db0694e4e57fed86c981a826849ad6a923740d97c7cc5901187c2257a1079571
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, many of which are structured as SEO link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The primary attack pattern involves directing users to these external sites, likely to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=couper+un+pdf+en+2+parties
    • https://cdn-cms.f-static.net/uploads/4470221/normal_60463ffba9261.pdf
    • https://static.s123-cdn-static.com/uploads/4468537/normal_6001f5b135fe2.pdf
    • https://static.s123-cdn-static.com/uploads/4454045/normal_5febb4c2ca032.pdf
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5febb0228fcd2.pdf
    • http://arnautmebel.ru/kuriwepopiwumena0ehm.pdf
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5ffc998fc8f45.pdf
    • https://cdn-cms.f-static.net/uploads/4526930/normal_600e61995ef94.pdf
    • http://italysummer.space/gusofusn5t.pdf
    • https://cdn-cms.f-static.net/uploads/4465949/normal_6052815099508.pdf
    • https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/6fa7c32705f.pdf
    • http://japancar-sib.ru/how_to_pair_jam_speaker_to_alexa51cm4.pdf
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/e8a456bab10d.pdf
    • http://trixy-matrix.space/graco_ready_to_grow_click_connect_double_stroller_car_seat9jbfg.pdf
    • https://cdn-cms.f-static.net/uploads/4465688/normal_602e4d2a3d780.pdf
    • http://discount50it.pro/lp_asidosis_metabolik9igtu.pdf
    • https://static.s123-cdn-static.com/uploads/4414494/normal_5ff856cea7d1b.pdf
    • https://cdn-cms.f-static.net/uploads/4383573/normal_60159f368057c.pdf
    • https://static.s123-cdn-static.com/uploads/4475203/normal_5fe01b9427d01.pdf
    • http://onlinekartiadesi.com/best_portrait_photography_hashtags_2019k8zaf.pdf
    • https://kofoxutekibefa.weebly.com/uploads/1/3/1/4/131454286/muwigexe.pdf
    • http://winoorama.website/foguzasugigavosozusoma73ta.pdf
    • http://prolac.ru/2311363034bap27.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de13.bin
56169049db189325576a4e82bbf130ff2259f9c9bc0b072837e84f65269e9323		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 5040 bytes
font_01_sfnt_off0000ef44.bin
0373666cf80221ea5590024e3bd814189457baca1e754908328fb3f29be98f95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 12932 bytes

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