Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61c93c6ef31776a…

MALICIOUS

PDF

76.0 KB Created: 2021-02-18 12:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1244cfae1b6d50df915cde7b384cc226 SHA-1: 386137fe8ec584322b7b5ca8e6ae1e7174de487c SHA-256: a61c93c6ef31776a7e6e52737c96d1e6abc9940f1c9ef4d7d5eb045efc43a5ba
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though partially obfuscated, references 'South beach diet ratings', suggesting a lure to a malicious website. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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://jacksth.ru/123?utm_term=south+beach+diet+ratings PDF link annotation
    • http://50offstore.info/english_talking_app_free_download8mn4h.pdfIn PDF document text
    • http://tixshopclub.fun/the_theory_and_practice_of_group_psy9dm7j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fd06bced896c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503791/normal_5fd642c525fad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_5fcf132e5e68f.pdfIn PDF document text
    • http://neo-tp.ru/chamma_chamma_song_free_mr_jattf7z3s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_5ff2a2c58abe2.pdfIn PDF document text
    • http://specrazreshenie.com/decrease_brightness_app_androiddgmtn.pdfIn PDF document text
    • http://netzamka.ru/68528603506pljir.pdfIn PDF document text
    • http://albatros-trans.ru/29399208776588iz.pdfIn PDF document text
    • http://universityru.fun/tewalukidalavilukoruxapedr3se.pdfIn PDF document text
    • http://ita-yog.space/wabukidafotuxgwbxu.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/zerejibixupav/lafapevinokoz.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/81496163410.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/56054704959.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/acidoctose_diabtique_dfinition.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/69978971396.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/run_android_apps_on_mac_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/tiwutizuvesisimoluful.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/80499560508.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/7752700766.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_off0000e883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 5412 bytes
SHA-256: 373010cf4a445af72ae519b439d61545ad11145737fc2572b725d768027ecd6a
font_01_sfnt_off0000fade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADE 12176 bytes
SHA-256: d8a853113e173ebf53a21696b3451a3f479efd74c4a583920d722dca66660c50

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