Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20e3f3f6fc55567…

MALICIOUS

PDF

78.9 KB Created: 2021-05-25 09:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 000a9da7af12ed23564873f628f7a0a9 SHA-1: 20abd574e90ec59d4417d5f86a89a8564fc2db30 SHA-256: d20e3f3f6fc555678638dcf6c2e1a005058192bee15af4c6bc4149f5493de28e
96 Risk Score

Malware Insights

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

The file is a PDF containing a malicious URL, identified by both ML classification and ClamAV. The embedded URL, 'https://maypoin.ru/strik?utm_term=mr+beer+instructions+cider', is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains keywords related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=mr+beer+instructions+cider PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463306/normal_60464fce1b5d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425726/normal_60272205cee3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_6009f86386c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_604031659841d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389792/normal_601481592f923.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_60035d27363e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423155/normal_6000f25cb240e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446374/normal_604d0253f2f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_606a26220fc41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369315/normal_603fc22977145.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nafoxuda/2164300789.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/pegogipul.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/can_you_put_an_electric_griddle_in_the_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/48142285211.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/the_vampire_diaries_books_stefans_diaries.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/brooklyn_99_full_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/batman_mame_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/domubirifogizudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/niririniwovida.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/the_carpenters_yesterday_once_more.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/apologize_piano_easy_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/punjabi_song_chitta_teji_sandhu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE927 4720 bytes
SHA-256: defe2d7c0704f5ac5400a0685af06267af0d8cce5e92ee2757d3883102a3dbc4
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 11436 bytes
SHA-256: a3ec441b6acd0e87ae3e45d7aee9b5f2b2763c1d55578a9af4c118835372416b
font_02_sfnt_off00012004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12004 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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