Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac540166387f396f…

MALICIOUS

PDF

77.0 KB Created: 2021-03-01 07:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f37c2809a0f639b7ed4c27d28a79d5e4 SHA-1: a7660bab121f165db1aaeb8b870d53d4f4d9414d SHA-256: ac540166387f396fcd8df6f1d7c276abc8716653ad2545c1b2fd7b6bdcca8847
134 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one pointing to 'lozipotod.ru', a domain associated with malicious activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wb?keyword=wall%20street%20journal%20prime%20rate%20graph PDF link annotation
    • https://cdn.sqhk.co/rigowodikot/hfichcc/pinkfong_baby_shark_song_puppets_with_tempo_control.pdfIn PDF document text
    • https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/1b4dd64dc1b2e5f.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/jchbjwH/how_to_watch_netflix_with_friends_apple_tv.pdfIn PDF document text
    • http://beliyden.xyz/metodo_de_tanteo_ejercicios7etln.pdfIn PDF document text
    • http://pressit.space/jaipur_tourism_guidel99zi.pdfIn PDF document text
    • http://rituralajozeli.iblogger.org/chhath_puja_song_pawan_singh.pdfIn PDF document text
    • http://pixilapusir.22web.org/descargar_whatsapp_web_gratis_para_android.pdfIn PDF document text
    • http://mastericy-chistoty.ru/what_does_word_availeth_mean8tbkf.pdfIn PDF document text
    • https://loworukad.weebly.com/uploads/1/3/5/3/135312099/41e15dc60250899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475382/normal_5fe915a721a33.pdfIn PDF document text
    • https://cdn.sqhk.co/sadetujadufi/hgegjpu/fodovikureke.pdfIn PDF document text
    • http://gufutaca6.xyz/harry_potter_book_series_authord7u0s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gobavaduxa.epizy.com/40444024578.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/62878372698.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/chain_reaction_game_template.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/64233845906.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE164 5204 bytes
SHA-256: 4a5bdfc6bec79c94ffc8509d7b57831f21fa6110d6102ab4f25bf4386c6d8327
font_01_sfnt_off0000f2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F8 11160 bytes
SHA-256: 3cee6b2291af1639c9a7cc148915832436b2ed0f0c3c239c360910437c967f1d
font_02_sfnt_off000118d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D7 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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