Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b050669f707c55…

MALICIOUS

PDF

104.7 KB Created: 2020-12-26 11:18:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5406ef5c5cca6305a2334ced9d629976 SHA-1: 74bcc94b64a2f4f28e9a1b5d0bae411f3dac14c0 SHA-256: e8b050669f707c55db1bae9a4bafc92d3cb0512463f1615597bd26b67182fd1a
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, indicating a phishing attempt. The document body, though heavily obfuscated, contains references to 'atomic structure worksheet answers 8th grade', suggesting a lure to disguise the malicious intent. The embedded URL `https://traffine.ru/123?utm_term=atomic+structure+worksheet+answers+8th+grade` is the primary indicator of compromise, likely leading to a phishing page or further malware download.

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://traffine.ru/123?utm_term=atomic+structure+worksheet+answers+8th+grade
    • https://cdn.sqhk.co/jasowipe/mxQjcPJ/zogofoxav.pdf
    • https://cdn.sqhk.co/zenujulikik/jigfkgj/wastickerapps_cartoon_stickers.pdf
    • https://cdn.sqhk.co/xamapetarel/hgcphhQ/drum_set_music_stand.pdf
    • https://cdn.sqhk.co/sakiforivona/ga8jbhd/man_o_war_steps.pdf
    • https://cdn.sqhk.co/fofasafiwi/fifLeCZ/logo_quiz_answers_level_6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/610cef1a-70fd-4c20-8d95-291ccf07c5dd/spongebob_squarepants_youtube_kids.pdf
    • https://s3.amazonaws.com/jozaponi/xosoxemuj.pdf
    • https://s3.amazonaws.com/warapagefasovi/widirudi.pdf
    • https://s3.amazonaws.com/zesotat/mefufo.pdf
    • https://uploads.strikinglycdn.com/files/b96a7ff4-0522-4357-bdb9-221412af622b/58564876363.pdf
    • https://uploads.strikinglycdn.com/files/3a75e8b4-a473-4462-81d9-eb1cb21bff96/24981284937.pdf
    • https://uploads.strikinglycdn.com/files/ad4baed1-1173-4f35-aadd-fa18221913ba/65518630615.pdf
    • https://s3.amazonaws.com/vuzotisenixava/53012462706.pdf
    • https://s3.amazonaws.com/viboxikuz/answer_back_use_in_sentences.pdf
    • https://s3.amazonaws.com/zirojopemup/lilefolaxowokevudapatimug.pdf
    • https://s3.amazonaws.com/labitajaxatufib/mechanical_engineering_technical_report_samples.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000141c9.bin
23014e8106002d2b23f981adbfcaf918eb35dbf79f2af1c826e07b48bdd43f0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x141C9 5660 bytes
font_01_sfnt_off000154f5.bin
943173cb2cbde98368904e445b9d2188ec23e1d4f6ca9c863eee64534fa84e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x154F5 12868 bytes
font_02_sfnt_off00017ff5.bin
a592162a049b3456564a21861371a9629d5167bbec010eb339ac319ebcd668e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x17FF5 16084 bytes