Malicious PDF — malware analysis report

Static analysis result for SHA-256 64643d4cf79983e0…

MALICIOUS

PDF

77.3 KB Created: 2021-03-06 03:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 193c234fb56201df8a5dd8d4a930a3b3 SHA-1: ca49838e056de952af6b1f3905ddd5d18032a079 SHA-256: 64643d4cf79983e0eb2de62de4d5cb59384b2fbf90378074ffff51cffee18b42
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that directs to a malicious domain, disguised with a lure related to 'keto meal prep'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/123?utm_term=the+best+keto+meal+prep+book PDF link annotation
    • http://fomijegi.mypressonline.com/the_postman_always_rings_twice_chapter_1.pdfIn PDF document text
    • https://cdn.sqhk.co/zesuxetirano/TijdZW6/best_craft_beer_gift_set.pdfIn PDF document text
    • http://wirobigi.medianewsonline.com/27927095100.pdfIn PDF document text
    • http://fidafevemikiwe.mywebcommunity.org/biology_textbook_for_secondary_school_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451930/normal_6026fc1eeffed.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/5Ghihgd/high_sea_saga_mod_unlimited_medals.pdfIn PDF document text
    • http://gakofutelaxojo.22web.org/tofijix.pdfIn PDF document text
    • http://xekawojuma.22web.org/21176652858.pdfIn PDF document text
    • http://fuluvil.iblogger.org/how_to_train_cpr_during_covid.pdfIn PDF document text
    • http://gigabaru.22web.org/72464169310.pdfIn PDF document text
    • http://tonalemeketav.66ghz.com/systematic_review_guidelines_equator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366402/normal_5feb5ccd089c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_6041b22c18705.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/fejojanitok.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/lorifumofelu/87802204488.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/aliens_vs_predator_movie_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e736da7-d5ed-4e36-9747-b2032c7127a9/25863618676.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/44962568421.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/year_5_comprehension_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/present_simple_beginners_exercises_online.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/kemegukerekomexuseliwimez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6645a34-d9fd-40ad-84a0-d39cc45d1e85/what_does_lockout_mean_on_a_furnace.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_off0000f244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 5212 bytes
SHA-256: 3cf6e454a2f51bec041e667634d9fb4523b65780178a0d8325f9c5d070fcfca4
font_01_sfnt_off000103c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C2 10700 bytes
SHA-256: 11b7ff668f2a0872c5904e647a8535c3e5e3bbbe5cde46c8ba77a53516859f4a

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