Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba9f172396cad14…

MALICIOUS

PDF

70.1 KB Created: 2021-03-06 23:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 49098c5e927d0b9af2113ed74637216a SHA-1: b4d3cbf09a43bdc4f9fce8c881861a59bc4354b1 SHA-256: 2ba9f172396cad145cc8fc22804bc58c98dcc6b37d78363be552caac93897865
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to other PDF files hosted on various domains, some of which appear to be disposable or potentially compromised. The primary purpose seems to be SEO manipulation or distributing further malicious content, aligning with techniques like Ingress Tool Transfer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://baarspo.ru/wix?keyword=luigi+bocola+northwestern PDF link annotation
    • https://cdn.sqhk.co/surofowudula/u0q1jiH/baduzojeluvaboxejemoluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/0wjewV0/space_3d_live_wallpaper_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/R0vkthg/pumafibuvixoraruzowuzus.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/cIOggex/how_dare_you_touch_me_meaning_bengali.pdfIn PDF document text
    • http://malespw.xyz/download_game_hotel_story_resort_simulationayoyj.pdfIn PDF document text
    • https://tazusovekofuwaj.weebly.com/uploads/1/3/5/9/135969448/pizuguxani.pdfIn PDF document text
    • https://jitifawe.weebly.com/uploads/1/3/5/3/135327084/famuvudexefowup_lofixulu_ropetoti_xazovuzo.pdfIn PDF document text
    • https://xodobojedabime.weebly.com/uploads/1/3/4/6/134675451/kazagexipozijiv.pdfIn PDF document text
    • https://cdn.sqhk.co/giravopakiw/NjbwOgh/41248815412.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/jFwagc9/97542073415.pdfIn PDF document text
    • https://tumurotijom.weebly.com/uploads/1/3/4/5/134512141/777220.pdfIn PDF document text
    • http://bigakeka.iblogger.org/duvesi.pdfIn PDF document text
    • https://vuxilimibipemop.weebly.com/uploads/1/3/1/4/131453056/dezifukidi.pdfIn PDF document text
    • https://cdn.sqhk.co/xodakebebit/Jgeha6G/image_editor_free_online_like_photoshop.pdfIn PDF document text
    • http://crispyset.online/mods_de_autos_para_rfactordo6b6.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/mulifajivut_muxezebomipabiz_wajizara.pdfIn PDF document text
    • https://biziliwedurukax.weebly.com/uploads/1/3/4/8/134889104/3284481.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/eji8iji/zero_vector_eigenvector_of_matrix.pdfIn PDF document text
    • http://converstarget.ru/tobowanepr7i7j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://senapofo.epizy.com/lagu_barry_white_my_everything.pdfIn PDF document text
    • http://piranirisajape.rf.gd/the_couple_next_door_plot_spoiler.pdfIn PDF document text
    • http://xevupan.rf.gd/54886837766.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_off0000d72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72B 5232 bytes
SHA-256: a761431a1d41e6688b4a14519d4c9ad31955ef3e38f7d26209a8043fdc14a324
font_01_sfnt_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 9848 bytes
SHA-256: d1b25fc15c5baac5c964637544ec30eb32fa08ede0fd2ead89149b79eb740855

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