Malicious PDF — malware analysis report

Static analysis result for SHA-256 831a719e2a2d7276…

MALICIOUS

PDF

74.8 KB Created: 2021-03-03 00:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4a878a275993b7ca760388e58181a01b SHA-1: 3cc3741db85e5fdf94c5b17d0e8a4eb6912dcc61 SHA-256: 831a719e2a2d72762348d0cd615ab4f2c1f4297c225cb1c67d89856b88b28528
104 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'Cavalier c-27 coke machine for sale' and includes an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of an external URI and the nature of the lure suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/123?utm_term=cavalier+c-27+coke+machine+for+sale PDF link annotation
    • http://punubukotulanes.22web.org/84_charing_cross_road_film_trailer.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/deloxipopu.pdfIn PDF document text
    • http://sasavojaraw.iblogger.org/pigewodamekemil.pdfIn PDF document text
    • http://zebinoleruf.iblogger.org/bhakti_song_dj_mix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_601c85e81196f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421339/normal_5ff8ed3c8f108.pdfIn PDF document text
    • http://lizoguxumugef.mywebcommunity.org/83755583829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478932/normal_601610c260600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373517/normal_5fffa34029bf8.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/dinigugaxej/caulfield_grammar_school_uniform_shop_opening_hours.pdfIn PDF document text
    • http://gavojomizam.epizy.com/99770523466.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/printable_coloring_sheets_thanksgiving.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/free_anagram_quizzes_answers.pdfIn PDF document text
    • http://tafobinememen.epizy.com/plant_ecology_schulze.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/what_is_the_difference_between_32_and_64_bit_computers.pdfIn PDF document text
    • http://mobisojew.epizy.com/26579498438.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/vavedesokamegol.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/the_darkest_minds_cast_mandy_moore.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE760 5396 bytes
SHA-256: d35a23d39bbd6f3849fc4bee4cb2ddef2b9a328fe9d79a70ed993de28619be8f
font_01_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 11036 bytes
SHA-256: 105fe6361303ebb0730238a6827dce2b9012f5df6ff48e8e2e9036c45714b584

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