Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b678a74fbee016…

MALICIOUS

PDF

74.5 KB Created: 2021-04-29 19:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0c27d11ca684080a1cce560f8ae859 SHA-1: a20a5301cce9ab1a09db92c5eeac692a3fb92875 SHA-256: a7b678a74fbee016b82925a8ff158bbe5f36dfa3f7b74888fecdc1b45fcfc35b
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to using a self-service laundry machine, which redirects to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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/strik?utm_term=how+to+use+self+service+laundry+machine
    • https://cdn-cms.f-static.net/uploads/4418391/normal_6047ca50af864.pdf
    • https://cdn.sqhk.co/foxoxaze/hhwVgcA/epic_skater_game_download.pdf
    • https://cdn-cms.f-static.net/uploads/4446015/normal_60150407d999d.pdf
    • http://autobaff.xyz/widefopoxamj86xt.pdf
    • https://cdn-cms.f-static.net/uploads/4417527/normal_603858d11b292.pdf
    • http://lalabomujulimof.mywebcommunity.org/process_of_ecological_succession.pdf
    • http://devgame.design/vamozavemenimrtlrq.pdf
    • https://static.s123-cdn-static.com/uploads/4447906/normal_6008e295889fc.pdf
    • http://gosugas.getenjoyment.net/21787009010.pdf
    • https://cdn.sqhk.co/zerurukoraju/1LhiRlV/bowling_games_online_free_unblocked.pdf
    • https://cdn-cms.f-static.net/uploads/4489724/normal_601b424aa693d.pdf
    • http://tizevij.iblogger.org/18525987925.pdf
    • https://cdn.sqhk.co/welosezu/4ghMSii/ethiopian_airlines_cargo_fire.pdf
    • http://ca-management.website/crs_reporting_cyprusktrtl.pdf
    • http://tututot.mygamesonline.org/93729485973.pdf
    • http://flipping-car.online/briggs_and_stratton_factory_service_trainingcoldo.pdf
    • http://trysol.xyz/wordpress_google_maps_api_key_errory7mpo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xalilitu.epizy.com/74766093916.pdf
    • http://balanuvanatitan.epizy.com/jarexevini.pdf
    • http://fowagimumaviguf.rf.gd/plantronics_voyager_legend_cs_b335aps_11.pdf
    • http://suvalon.rf.gd/90328102452.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_off0000e2bd.bin
09ea5030d114d5387a36d583dd327965d989f0ad0b4c652bebe140cf2436e5c6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 5476 bytes
font_01_sfnt_off0000f54c.bin
add12b5ce9a277e1d72cc863324e8daf974eabb8e1a99595b95e9bc3e91de3d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xF54C 11540 bytes