Malicious PDF — malware analysis report

Static analysis result for SHA-256 caf1f061db31469d…

MALICIOUS

PDF

131.6 KB Created: 2021-01-17 17:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 62360e3d15162791649015a63e37bdd7 SHA-1: 556c6157493337b3e6442e6e5860fb5c95eaafe8 SHA-256: caf1f061db31469da46650a4a19e075b9a2fab93339c11e1ef5429231e56aadb
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'Pats tennis 2019 dates', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=pats+tennis+2019+dates PDF link annotation
    • https://site-1166659.mozfiles.com/files/1166659/sovekalusuzaneropudolise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5fa73f961a4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368500/normal_5ff1e25064661.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/sRX7iis/22611822083.pdfIn PDF document text
    • https://site-1166603.mozfiles.com/files/1166603/43594791454.pdfIn PDF document text
    • http://madusotiju.22web.org/8842006168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f8d49156b6e6.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/rizezobabub/macbeth_act_2_scene_1_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/67733726315.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/bootcamp_windows_support_software_fails.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/job_cost_sheet_template_free.pdfIn PDF document text
    • http://konevimojo.epizy.com/cause_and_effect_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/serenity_rpg_six-shooters_and_spaceships.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/88982357472.pdfIn PDF document text
    • http://zukewanika.rf.gd/80959410281.pdfIn PDF document text
    • http://lenixad.epizy.com/hans_zimmer_cornfield_chase_sheet_music.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000187fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187FC 6716 bytes
SHA-256: 9b67532829afc2631ecfe2c5af47fc360ea0df4fdf4f65325fca67d100999bd8
font_01_sfnt_off00019ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EE5 5172 bytes
SHA-256: c1e6671e357c970d4fe64420f0572bff36b5ea6994630a1262de31fec5d91501
font_02_sfnt_off0001b082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B082 4460 bytes
SHA-256: 84eff31cf70cbb0fd6e5ed62f7f0ab22a7fb50c7240c4d6517a3ace1e777d69b
font_03_sfnt_off0001be86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE86 13844 bytes
SHA-256: 4a5800aa792a6f61e4f36dc894063fb31ca6464a139d7b36b0d11c6df4c14903
font_04_sfnt_off0001eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAB0 16184 bytes
SHA-256: 36008a0934a1d38fa8428ce695d4791ee72dcb28bd49a73f388d5c1ed26def0b

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