Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab4a7f04bd7172e…

MALICIOUS

PDF

83.9 KB Created: 2021-04-02 21:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00c0ce4f64dfc7bea22f2212c1fb1187 SHA-1: 7a856901d8b69d1615bf39924c33b17543c43651 SHA-256: 4ab4a7f04bd7172e652fe07c7b4e7a579eaf8a82ab04caa2457ff19fc89ffdd3
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which point to disposable domains, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, appears to be a lure related to 'Solax inverter data sheet'. No scripts were extracted, but the presence of numerous external URLs indicates a high likelihood of redirection to malicious sites or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://jacksth.ru/123?utm_term=solax+inverter+data+sheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453100/normal_6013a30297d66.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/Glhbhhf/demarujunidoxenabozaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_6041c1abc06d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391642/normal_5ff412f157b55.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/s9MghWX/60199982597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_605cf438b8530.pdfIn PDF document text
    • http://biwepojulax.22web.org/mitudorugalaxifijefizo.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/O3gdrfN/japiwufupozozufodel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455658/normal_606092dd78165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427085/normal_5fef7944849ab.pdfIn PDF document text
    • http://fusobilel.iblogger.org/dawin.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/h6jg3Aj/street_chaser_mod_apk_4._0._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_604309fa5b79d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_5fe9925ea0ba5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_603c6a1674c22.pdfIn PDF document text
    • http://tisekadulokin.iblogger.org/harry_potter_and_the_order_of_the_phoenix_full_movie_dailymotion.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://kotalozobazad.rf.gd/does_brown_rice_or_quinoa_have_more_calories.pdfIn PDF document text
    • http://vipezirovopegem.epizy.com/warcraft_3_reign_of_chaos_cheats_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/love_test_calculator_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/mega_filmes_hd_apk_2019.pdfIn PDF document text
    • http://gixogofano.rf.gd/basta_de_historias_andres_oppenheimer.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/concrete_box_culvert_design_software_free.pdfIn PDF document text
    • http://kawobos.rf.gd/modelo_canvas_lienzo.pdfIn PDF document text
    • http://vusepezu.epizy.com/farmakokinetik_dan_farmakodinamik_obat_antasida.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/10313010944.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/1_metro_cuadrado_cuantos_centimetros_cubicos_son.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A3 2960 bytes
SHA-256: ffe008f00bdab04e42d0fb58581e94ebe343bab047a3ea3be819508d06260cf3
font_01_sfnt_off0000fd13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD13 4932 bytes
SHA-256: 4043dec04ec1813f841463ffe7aae67725d5369966c5b5a21784d4793e483177
font_02_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 11004 bytes
SHA-256: c2961d0927d69635ddc832108bb2aa4178830a5fcde64a4625d028d5db4dcc90
font_03_sfnt_off00013309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13309 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230