Malicious PDF — malware analysis report

Static analysis result for SHA-256 689d1a9116264863…

MALICIOUS

PDF

76.5 KB Created: 2021-03-06 14:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1272be040b340468d14c4a376389ca44 SHA-1: 2fdcfbd686b7ea5ce470534555012582dc257670 SHA-256: 689d1a91162648638e49dba90cbbf6b3308444bb4e22af3da1c5cf6e58edfc60
156 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a link farm and an embedded URI pointing to a suspicious domain. The document body, though partially corrupted, suggests a lure related to Firestick remote troubleshooting. The presence of numerous external links, many leading to PDF files on unknown domains, indicates a phishing or spamming operation designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/123?utm_term=what+to+do+if+your+firestick+remote+won%2527t+work
    • https://dadixuva.weebly.com/uploads/1/3/4/0/134018012/pezewejeb.pdf
    • http://vknart.xyz/zapipi4eh2.pdf
    • https://sutogibigasoju.weebly.com/uploads/1/3/1/0/131070189/ragide-zatezovika.pdf
    • http://kufejat.sportsontheweb.net/trane_xl80_furnace_filter.pdf
    • https://mepalowe.weebly.com/uploads/1/3/1/0/131070826/keworupozifix.pdf
    • http://sovuradema.medianewsonline.com/zovewemid.pdf
    • http://agent-ritual495.online/patologia_basica_robbins1z0no.pdf
    • http://josumewemuzob.getenjoyment.net/11959156739.pdf
    • http://wisatemubudu.medianewsonline.com/71545286421.pdf
    • http://rowowesofazov.medianewsonline.com/kujeso.pdf
    • http://tuderoba.getenjoyment.net/21331034529.pdf
    • http://zespodsvetkoy.site/hampton_bay_ceiling_fan_remote_pairing1tpyp.pdf
    • https://vevumugenewasu.weebly.com/uploads/1/3/0/7/130776279/wesusipewefipi_kukosazizar_fafupaf.pdf
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/2fd3c2e89f5d5d.pdf
    • http://dogalijun.scienceontheweb.net/2004_dodge_ram_1500_brake_light_bulbs.pdf
    • http://laulu-go.ru/lilugudepajotagovesinuvd1g39.pdf
    • http://suwadebizon.mywebcommunity.org/what_do_you_mean_by_kinematics_and_kinetics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/160c90e6-e4d2-40a3-ae07-3c1efd92c3df/2551991744.pdf
    • https://uploads.strikinglycdn.com/files/4be47820-84c7-4c8d-bf94-d4c0a77d5fb5/bivoseve.pdf
    • https://uploads.strikinglycdn.com/files/f91d1e9a-95d1-4921-ab97-1a70d0a7d46c/how_does_a_roosa_master_pump_work.pdf
    • https://uploads.strikinglycdn.com/files/48d62539-d972-4931-9fd1-33f6fd206aec/how_to_read_ekg_book.pdf
    • http://vorisenunajix.myartsonline.com/punagupefika.pdf
    • https://uploads.strikinglycdn.com/files/e93277e3-715c-4a49-9ea7-653781583afa/shadows_of_brimstone_rancher_upgrade_chart.pdf
    • https://uploads.strikinglycdn.com/files/8ab58736-1044-4d12-a1bb-eb2495e56cbe/clean_drain_pump_filter_lg_top_load_washer.pdf
    • https://uploads.strikinglycdn.com/files/b176e130-306a-40f7-bc03-39fb950e8c04/zenewezazuvevisi.pdf
    • https://uploads.strikinglycdn.com/files/3d162253-6b02-479c-8809-c0c3b4f0ce48/how_do_you_unlock_a_locked_lg_phone.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_off0000ece2.bin
4f0bd4c04bbc8b1a1db4f5e6f6a193c319db1429244776919882128fa9fba8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE2 5536 bytes
font_01_sfnt_off0000ffb4.bin
574ce21d33750af49b1a51fbe013f5c9b1349fb0c05b929e30654f7172a303d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB4 10696 bytes

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