Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3c313d2c925b7b…

MALICIOUS

PDF

78.6 KB Created: 2021-02-03 03:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 479da9ffc872ecebff47087c162b5255 SHA-1: 9813437aefad77a62d4d8b3f7b8f73792a97c9c2 SHA-256: 2c3c313d2c925b7b61463361054cafb33e656c7c03b7748ad4681cb9748fe7c2
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the embedding of malicious links.

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://maypoin.ru/123?utm_term=verizon+small+biz+rewards+twitter PDF link annotation
    • http://faguduni.22web.org/pobisidewizenowizeveb.pdfIn PDF document text
    • https://putukaxuke.weebly.com/uploads/1/3/1/4/131437363/nokeninutadebop.pdfIn PDF document text
    • http://habercigo.com/applying_the_kingdom_myles_munroemlrj8.pdfIn PDF document text
    • http://itanto.space/ringtones_for_phone_callsd1bm4.pdfIn PDF document text
    • http://socialwave.me/pumirabadepupebiniruw3p8fg.pdfIn PDF document text
    • http://winoraama.site/edit_offline_freewareekdcy.pdfIn PDF document text
    • http://naturfresh.space/tunizuxinutebfisb.pdfIn PDF document text
    • http://alkostore.xyz/50028159282q9yll.pdfIn PDF document text
    • https://vemusosafuz.weebly.com/uploads/1/3/1/3/131398108/vazevubimezuzumenam.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/29a5c84cae.pdfIn PDF document text
    • http://stikc.xyz/gamers_wallpaper_cell_phonel9bkw.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/wukunelotezomvwr7n.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/jaloto/dojoxugagowo.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/chlamydia_test_of_cure_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/dar_es_salaam_stock_market_report.pdfIn PDF document text
    • http://subedawulowuwo.epizy.com/bookkeeping_in_excel_format_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/sportstats_android_app.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_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 5216 bytes
SHA-256: 067ab939e7d00daa845b16a7700359ec94cdd19710361f102840448bd67f8f41
font_01_sfnt_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 12336 bytes
SHA-256: 89f23dd5f1631c19d2e37d0e5b6babcb4b94af7d4bc4702f17de8a69e29cb342

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