Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f6e85c7540a83f…

MALICIOUS

PDF

73.8 KB Created: 2021-06-10 14:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9cceccf5879899f67111ae27c0b7db17 SHA-1: ee57c161bb5832c5806e505f21e54da7c1240f05 SHA-256: f1f6e85c7540a83fbbcf92f9c109ca21260980fadb19e67b115a870c88f8bb4f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains references to 'Fts 19 download apk' and is associated with external URIs that likely serve as download or redirection points for malicious payloads. The presence of numerous links and disposable hosting suggests a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://laborke.ru/pbw?utm_term=fts+19+download+apk PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4464525/normal_60b52877b06dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412996/normal_5fec3e52aa30e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465128/normal_5fe652354bbc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5fe3de7c71216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_606ac6203675a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5fd661a7f4091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417530/normal_6059cd84a86d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_602b48e572aeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezupagijene.pbworks.com/f/xozulovigulanajemakapa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3b9fb2-0b5d-495f-8e6c-b99a9fde88ea/38830370407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aaddbab-cddc-4450-9413-09f6cda30a0d/zivelaxebibusanuzu.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144478506/lilurotidateko.pdfIn PDF document text
    • http://wirabofitox.pbworks.com/f/pichaikaran_tamil_songs.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144628674/defiant_180_degree_white_led_motion_outdoor_security_light_instructions.pdfIn PDF document text
    • http://gonumutat.pbworks.com/f/printable_jack_and_the_beanstalk_story.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/peso_molecular_de_la_plata.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144470553/les_dieu_sont_tombes_sur_la_tte_film_complet_en_francais_1.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/lesen__schreiben_b1_download.pdfIn PDF document text
    • http://kuxuraroj.pbworks.com/f/fifa_19_apk__obb_download_for_androidoffline_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df37776-ae9a-4d99-b7d3-d8bc38d3a9e2/dragon_ball_z_xenoverse_2_mod_apk_download_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2c8543-97bf-4bee-8be8-efc862d89213/95877961359.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/can_i_use_wireless_mouse_receiver_as_bluetooth.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/ultra_shaders_minecraft_pe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab8cad8-ee21-407b-a670-2fa08aa66620/gofunejajewexafevanalogi.pdfIn PDF document text
    • http://gatunam.pbworks.com/f/xafazilojajav.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 5176 bytes
SHA-256: 985c12414a6762b9ff8a295a08796061a463270357a0fd24a3766978622ec9d7
font_01_sfnt_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 10880 bytes
SHA-256: 2264da3209dca385634a5b55e32e19e3cf1ff0f1aa9630225edf4e9bfbeef682