Malicious PDF — malware analysis report

Static analysis result for SHA-256 22abd5ff10f4fde7…

MALICIOUS

PDF

84.7 KB Created: 2021-03-23 00:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32065ee5d0d1824a9525c6b474763677 SHA-1: 99fa275ba105d11d58ee843dd89d4c64d1710a75 SHA-256: 22abd5ff10f4fde73eb0262bfbb03bd80aa393473335ef5401ebb3a917fec344
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which are likely part of an SEO link farm designed to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the attack pattern of luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/strik?utm_term=kx+100+price+philippines
    • https://cdn.sqhk.co/pijujuweg/hguFBwR/crash_dive_game_manual.pdf
    • https://cdn.sqhk.co/nadevukoved/mTfP3GF/kewovakuxazexorekepileti.pdf
    • http://manidat.sportsontheweb.net/tyson_critical_theory_today.pdf
    • http://bamirajewenexo.medianewsonline.com/beekeeping_handbook.pdf
    • http://xifadezuzurap.medianewsonline.com/cessna_172m_operating_manual.pdf
    • https://cdn.sqhk.co/furugilenu/t2haXTC/pajozako.pdf
    • https://cdn.sqhk.co/zapakolozu/gijhfXV/full_movie_site_bengali.pdf
    • https://cdn.sqhk.co/bigulikexupa/GKjc1hh/dedazobagedazakubazazanef.pdf
    • http://libertinemodels.com/82862482251yqx6t.pdf
    • http://reactivascotia2020.com/compound_shapes_area_worksheet_tes3pre9.pdf
    • https://cdn.sqhk.co/purorenutuw/fidphhE/revoran.pdf
    • https://cdn.sqhk.co/durotula/W3jjNid/bhop_go_game.pdf
    • https://cdn.sqhk.co/mekizojo/idjijjg/zorokikebidibujexaxu.pdf
    • http://buputenajonix.mywebcommunity.org/72142292129.pdf
    • http://libutulidux.medianewsonline.com/glossary_of_social_science_terms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/marimejerebo/gulzaar_chhaniwala_kasoote_ringtone.pdf
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_d89760ef2a3045e4b586142751bb6ee2.pdf?index=true
    • https://6593eeda-10fe-4128-810f-cbbc79f0a4f8.filesusr.com/ugd/c0a4bf_9e6c7d40321844f6a7af379968e1b508.pdf?index=true
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_a8e270b6352143c58562ccb2164dc66e.pdf?index=true
    • https://s3.amazonaws.com/fokapikow/adjectives_year_5_worksheet.pdf
    • https://s3.amazonaws.com/divikufifir/mcgraw_hill_financial_accounting_chapter_5_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef52.bin
eb31f590ea4d4afde4fd47a37d13f66a063b3f36714eacdfa541f03e1f9dbecc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 4640 bytes
font_01_sfnt_off0000fefa.bin
b24b6db40b62dc7f1468953f3c6a13d7fe1a9dd4746ee8ca44c44d0248693d63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 10460 bytes
font_02_sfnt_off000122b8.bin
676c0883841b43d00b7ee9e48740bba0cd0e68334271d7a078f050a57dd23d8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122B8 16060 bytes
font_03_sfnt_off0001374d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 4324 bytes

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