Malicious PDF — malware analysis report

Static analysis result for SHA-256 4851834f106d98a7…

MALICIOUS

PDF

70.8 KB Created: 2021-03-03 03:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b6d405175aac663213fd7f3efc346716 SHA-1: a9bca6f81e267039ce036b72e7dd46e61e643104 SHA-256: 4851834f106d98a7d3cf8a7877142d33526cfcf25c14cc3f5434de59a1bbbc34
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=download+primary+school+textbooks PDF link annotation
    • https://vuvoxuwamulixa.weebly.com/uploads/1/3/0/7/130739220/tazesi-vezaferagijis.pdfIn PDF document text
    • http://magnitoli-2ekran.site/capitalism_vs_socialism_debateyj4xy.pdfIn PDF document text
    • http://oneitshop.pro/naranod6w8e.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/rfqXhiz/old_classic_board_games_list.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/e6INjgv/dozadigerowinipexebav.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/vizomigerifewegixu.pdfIn PDF document text
    • https://duragafadave.weebly.com/uploads/1/3/1/4/131438389/c898f.pdfIn PDF document text
    • http://sujakamemi.22web.org/honeywell_rpls740b1008_instructions.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/9784434.pdfIn PDF document text
    • http://waystep.site/como_eliminar_las_tarjetas_de_credito_en_amazonb1cej.pdfIn PDF document text
    • https://lifusapemar.weebly.com/uploads/1/3/4/5/134526201/sogumesada-gaxusexo-wosida-daposebe.pdfIn PDF document text
    • http://uscovidcharts.com/mamixavivijamolovenevojdgys6.pdfIn PDF document text
    • https://loxutagunepolu.weebly.com/uploads/1/3/4/7/134763456/wijoz_nezaxajatewuz_divekiwexu.pdfIn PDF document text
    • http://boxberry-24.cc/kiran_maths_book_for_ssc_in_english0zvbs.pdfIn PDF document text
    • http://tipografiyav.moscow/my_little_pony_tails_of_equestriaju4v7.pdfIn PDF document text
    • https://cdn.sqhk.co/kiledone/iVKZx8u/world_cup_1986_qualifying_conmebol.pdfIn PDF document text
    • https://tunoworuv.weebly.com/uploads/1/3/4/0/134017870/jorujukegowatenemi.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://rodujuvutadaxam.epizy.com/69290405152.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/94611561109.pdfIn PDF document text
    • http://sikabijixiru.rf.gd/what_is_theory_of_computation_in_hindi.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_off0000cac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC5 5568 bytes
SHA-256: c81f2ff526ae85cbdc17c49e1472b3a552515656b6a0329c66c86dd8d53addfd
font_01_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 10076 bytes
SHA-256: 41d0ec4ee37dbde4ee3d86a1a83574378fb0c06bdb60275ca90a680ff0ae3787
font_02_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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