Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb8e576b722ada0…

MALICIOUS

PDF

85.1 KB Created: 2021-02-17 00:33:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ac55d0d86e3b05b0103868e3fcd84f73 SHA-1: 41db4c9c5395ca6ef7bd67d2f4d855e994b6f1b7 SHA-256: 3bb8e576b722ada002b1fdb5fa014906deb16d96893cfbbfce4515226bcbb3aa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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 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.
  • 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://bologen.ru/aws?utm_term=how+to+install+mtx+terminator+tna251+amp PDF link annotation
    • https://cdn.sqhk.co/bijowiroma/jdHheIn/solitaire_card_games_io.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/Dgewdgh/36493748344.pdfIn PDF document text
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/86c73bee0760.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopiroxab/iiiidii/lofexedopokajotap.pdfIn PDF document text
    • http://patavitukazinaz.iblogger.org/ameda_breast_pump_finesse_manual.pdfIn PDF document text
    • https://wepejusekubikur.weebly.com/uploads/1/3/4/4/134441987/jibakizojegabegowa.pdfIn PDF document text
    • https://xezatitewifesel.weebly.com/uploads/1/3/4/3/134393938/vewigedojunabinuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/gcUqhaF/50641194875.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/jk23yIY/fofusoligiramib.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/wutisukamudox.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
    • https://s3.amazonaws.com/jemazejodep/dsei_2017_exhibitor_list.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/pozir.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/7948233147.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/reduzomavuvuvigakik.pdfIn PDF document text
    • http://xaxurotowikofew.rf.gd/appolum_paranjille_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/datetonadodiluloburubej.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/integrated_chinese_1_4th_edition_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/autocad_2d_office_furniture_blocks_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/biohazard_resident_evil_4_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/outofmemoryerror_at_android._graphics._bitmapfactory._nativedecodestream.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/beyond_the_sea_piano_solo_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/nujeluvifefodewuniba.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BE 5180 bytes
SHA-256: e9fd34e5ae3151fe10e12dc8470d124aa2eebfea22d15de2f606ae6081d4df59
font_01_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 12816 bytes
SHA-256: f6f2fa683fe462cad320073f51003f7a5eac71a0fc52aa90e65841c19a60f3c8
font_02_sfnt_off00012391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 16124 bytes
SHA-256: 585e9e02728972cd96d7a87700f46e3a42a8179f63ec1162a99e74ec42979be2
font_03_sfnt_off0001387e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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