Malicious PDF — malware analysis report

Static analysis result for SHA-256 c221d6745636a070…

MALICIOUS

PDF

71.6 KB Created: 2021-03-20 18:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f8b2f35318cb64e470511899267612cd SHA-1: 22cd5a7111865bd04a9cbd57929e0712a0f08af5 SHA-256: c221d6745636a0701d26092c0b8f6f9da1c1e58380d22f3a0abcf12aa368737d
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URI points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=what+element+do+all+living+things+contain PDF link annotation
    • http://nigavereke.mygamesonline.org/26946054417.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/dipokexolo.pdfIn PDF document text
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/2c5b0ba41f.pdfIn PDF document text
    • http://rijepesejib.22web.org/23491269093.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/administration_officer_cv.pdfIn PDF document text
    • https://muxojuwarerufi.weebly.com/uploads/1/3/5/3/135388895/wumokawoxuwez.pdfIn PDF document text
    • https://robedovetukurur.weebly.com/uploads/1/3/4/7/134754045/peluberokanadeb.pdfIn PDF document text
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/0cd1ef6b898f2d5.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/zerejibixupav/budapest_travel_video_guide.pdfIn PDF document text
    • http://renebizokav.epizy.com/70801950770.pdfIn PDF document text
    • http://xibigenoz.rf.gd/how_to_clean_the_dyson_v6_motorhead.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/mevakisub.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/kovudabivejezuxozafebo.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/b_a_r_c_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/english_grammar_worksheets_suffixes.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/school_calendar_2019-_20_deped.pdfIn PDF document text
    • http://sarozaxag.epizy.com/arunachalam_tamil_movie_full_hd.pdfIn PDF document text
    • http://vugapadilubokis.epizy.com/28002983773.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/the_expanse_season_6_air_date.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_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 5328 bytes
SHA-256: cf1c1a886b4c61598e0f8f0df5dd575597ff4106fcd4190548cb80fd345978a0
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 10648 bytes
SHA-256: ea0e6c6b93a63b6f679c1db0f3ca45e39ffeff26f72d6a6a32328c2c5aed1343

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