Malicious PDF — malware analysis report

Static analysis result for SHA-256 da443eb050d80866…

MALICIOUS

PDF

84.5 KB Created: 2021-04-29 12:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0a51701f9a29ca65247b2a4f8a2695e7 SHA-1: 7529b34dcacc9c7ee944830d3423fab164c4ec48 SHA-256: da443eb050d808661c62932505d673883483e52c95d526df45d7cf6c2a948b75
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a malicious domain, likely intended to trick the user into downloading a payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to art concepts, further supporting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://maypoin.ru/strik?utm_term=conceptos+esenciales+de+las+artes+plasticas+juan+acha+pdf PDF link annotation
    • http://tikopariwoxa.mygamesonline.org/biological_nitrogen_fixation_in_plants.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389821/normal_5fcbb933befb0.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/building_design_and_construction_handbook_philippines.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427300/normal_60500c8a7a0c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_6055f955de832.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/96689462965.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/alcoholismo_en_el_adolescentes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5ff8a8776c60f.pdfIn PDF document text
    • http://tareworig.mywebcommunity.org/19236790275.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liguwubore/linksys_ac1200_usb_adapter_not_working.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/fesididevowelolamaji.pdfIn PDF document text
    • http://rabelame.atwebpages.com/gojoxararukanogejuneli.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/jabiv.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/jumanagisewesukurufikox.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/atamelang_ho_jehova_by_teboho.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/aerobic_biodegradation.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/lupafiparizukokumefoda.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/nigotukepuzazebarologoto.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/intex_28673eg_krystal_clear_cartridge_filter_pump__saltwater_system_manual.pdfIn PDF document text
    • http://xepatodop.onlinewebshop.net/pizufo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48D 5224 bytes
SHA-256: 3a46379c1c3d55cd49e0f65d354047dfc268a9c57096cd3c90e09047e205c584
font_01_sfnt_off00010649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 12012 bytes
SHA-256: 0a9ebdbfe50e5f8cd8168e334a8904349f3df9433a47ea85d370d62953d4f8c3
font_02_sfnt_off00012d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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