Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4fcfff0abd52f1…

MALICIOUS

PDF

76.8 KB Created: 2021-03-19 00:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53d6aac381cf9ce680062dae454178c1 SHA-1: d15c6719a0a15a935c96573844ff335ccaaf547b SHA-256: 6e4fcfff0abd52f1c9ba0cf2cef69186155a5a914e7ce7305c94ff2037720ddc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is used to host numerous URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=alternative+renewable+energy+sources+pdf
    • http://trickyturkey.com/how_to_change_weight_watchers_scale_batteryc79dn.pdf
    • https://cdn.sqhk.co/kixagixupo/iliezje/panuwimepebi.pdf
    • http://arbitestpark.xyz/an_introduction_to_positive_economics_lipsey_free_downloadiliw8.pdf
    • https://cdn.sqhk.co/jizapamilizo/Upkgc1X/arcade_games_online_play.pdf
    • https://cdn.sqhk.co/sarunasol/6qCj1gc/blackpink_songs_english_sub.pdf
    • https://cdn.sqhk.co/fepewujufa/I4xdjbR/gun_gang_level_58.pdf
    • https://cdn.sqhk.co/kigimole/1ghgeAR/syberia_1_2_nintendo_switch.pdf
    • https://cdn.sqhk.co/begokaxawip/iNjifK3/stick_run_gift_codes_2020.pdf
    • http://igafnd.org/nifarofibunesuxs3uqb.pdf
    • https://cdn.sqhk.co/gomiwopizi/hjRxw43/virus_scan_for_iphone_11.pdf
    • https://cdn.sqhk.co/zonurubo/gXA2zwv/togapovinojewitepubitega.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_e7e1c043b9714dc4ba8828a35ddb3995.pdf?index=true
    • http://warunegiluj.rf.gd/functional_group_practice.pdf
    • http://gaditerigasut.rf.gd/ff14_bard_guide_2018.pdf
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_e5f62383a2184de9bc2b332adaa8b39f.pdf?index=true
    • http://mobisojew.epizy.com/bonakebeguxixidagak.pdf
    • http://gakifok.rf.gd/lotidixadago.pdf
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_de3471d90b7245cc841aaa33d169d3ef.pdf?index=true
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_edab064cd92f4c40a714d85d506feafd.pdf?index=true
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_846e140cc6a24089b0d273eaffe92f5b.pdf?index=true
    • http://kotutuvotijol.rf.gd/mexewalukis.pdf
    • 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_off0000edbb.bin
023af9f5ce7efa66668e9743eb0e1be8e246580cf473db32eeb9fc6266813c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 5704 bytes
font_01_sfnt_off00010152.bin
8c24d80fc554a044dbaa73a6a64a3d7846465cdc238d812a3695ce10ea032f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10152 11244 bytes

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