Malicious PDF — malware analysis report

Static analysis result for SHA-256 547dcf41b7357148…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 12:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d87a043fce05a5bb26f66cf8d92cf363 SHA-1: 4442bf1fd7f51a35aa35effbc6e4de9bc135e5ad SHA-256: 547dcf41b7357148f0e213206e7236df41404e956d9887844050e030f9edd56b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. No scripts were extracted, but the presence of a malicious URL and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=elementary+number+theory+notes+pdf PDF link annotation
    • http://povidusajis.iblogger.org/college_admission_letter_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501385/normal_604ad9bcdeb61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_60300e801f692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_6035ddb629a6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_601e7b31ebe62.pdfIn PDF document text
    • http://gubuxuk.scienceontheweb.net/how_to_use_innova_obd2_scanner.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/arduino_upgraded_learning_kit_manual.pdfIn PDF document text
    • http://delabozaxexiris.getenjoyment.net/oxford_dictionary_book_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5fce28066bce6.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/68611909147.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/bejideba/nivofutoze.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/63251607478.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/australian_passport_application_form_for_child.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/75528226905.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/cephalosporins_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/mazopubudozalux.pdfIn PDF document text
    • http://pizoxuwa.epizy.com/daily_english_news_paper_download.pdfIn PDF document text
    • http://fasevebozumip.rf.gd/christmas_brain_teasers_worksheets.pdfIn PDF document text
    • http://gaxosinuda.rf.gd/nikezirazulomefolap.pdfIn PDF document text
    • http://welidigukiru.epizy.com/angular_formgroup_show_errors.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_off0000ebbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBE 5480 bytes
SHA-256: 77224c719c6087053100f6747f0ddaa07c57fe423414308ac368e6ada698de3f
font_01_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 10716 bytes
SHA-256: 1073f954d9afc64c1ccdb97c0912946ef3029eead0c8d0cf69fe7f96c7b7f2cc

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