Malicious PDF — malware analysis report

Static analysis result for SHA-256 8debdac91607a039…

MALICIOUS

PDF

81.0 KB Created: 2021-03-04 12:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6d29a325b8046750d979ce6736348f4c SHA-1: 9be37edadefa562083a5e689eb7c8db8923327c3 SHA-256: 8debdac91607a039a0eb11a8b2255a71e537b38aa66fabf75565cfae85374f02
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'golowaki.ru', which is likely a phishing lure disguised as a search result for educational content. No scripts were extracted, but the presence of the malicious URI strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=calculating+thermal+energy+specific+heat+worksheet+%25232+answers PDF link annotation
    • https://cdn.sqhk.co/fabetojowuje/hgWjhif/81368334785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_6025b92f27b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_6028f65a28c9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459481/normal_5fe3bcac944ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444100/normal_5fed09fce35d3.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/gfgchfl/megupodum.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/5ij2gg3/12981668369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467612/normal_5fdb1b305a2ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449987/normal_60344a6b982a3.pdfIn PDF document text
    • http://sanasojan.22web.org/rl_bill_of_lading.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/vipinib/zefuwuxogujik.pdfIn PDF document text
    • http://taravelimaliliz.rf.gd/logitech_z623_2.1_pc_speakers_review.pdfIn PDF document text
    • http://jopukekuwunevig.rf.gd/review_samsung_a10e_phone.pdfIn PDF document text
    • http://vabedagexod.rf.gd/best_app_for_free_bollywood_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/varalokunej.pdfIn PDF document text
    • http://xesidif.epizy.com/vukevewalimedu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/9396175420.pdfIn PDF document text
    • http://fipomazuwasa.epizy.com/racing_ruined_my_life_meaning.pdfIn PDF document text
    • http://kojajopi.epizy.com/messenger_for_android_4._4._2.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/pamipilol.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_off0000e9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E3 5592 bytes
SHA-256: 37a94b074ac45f1df97b0f86df0f59dadbfa2bd687093c05bab30710f8beba24
font_01_sfnt_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 10740 bytes
SHA-256: 556f45929f2dc8f6e4cca1903528173e8d6d044817e0c5a687713ce9b5d86ff7
font_02_sfnt_off00012196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12196 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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