Malicious PDF — malware analysis report

Static analysis result for SHA-256 2144209dbc998138…

MALICIOUS

PDF

100.6 KB Created: 2021-05-09 19:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fda7c572949dfa9029ad35f8f71d8473 SHA-1: 77fab1d8b90ed920f2695300f92ede7f9c5a0be3 SHA-256: 2144209dbc9981388aa58e10e03d167c0cff9d7532df00eba2a0d132c91e6ccd
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, appears to contain metadata related to digital media and the tool used to create the PDF, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=what+does+mean+by+digital+media PDF link annotation
    • https://cdn.sqhk.co/tunaluvum/iejcspw/95188929455.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/Cz8qigw/16860953904.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/dijdjex/photolithography_book.pdfIn PDF document text
    • https://cdn.sqhk.co/daxonotetil/stv0Agd/gas_prices_in_california_april_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/PiaUgdD/warhammer_age_of_sigmar_armies.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/l0bibhg/ducks_unlimited_calendar_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/didirepakavi/ieI1xkM/2387602639.pdfIn PDF document text
    • http://vsspb.ru/learn_how_to_do_magic_tricks_for_beginnerso6ux5.pdfIn PDF document text
    • https://cdn.sqhk.co/gaximeme/dM3T3Gj/sokufed.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/iihbyQh/31289502244.pdfIn PDF document text
    • http://setlyb.online/fotetoxu608vi.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/rerinago/86221839633.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/gcse_guide_past_papers_maths.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/android_phones_under_25000_naira.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/simon_vs._the_homo_sapiens_agenda_similar_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/lost_girls_and_love_hotels_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/jekosefixediwopiwav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a5d893-160d-4579-b64a-80c6c9389fba/convert_hi8_camcorder_tapes_to_digital.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/indesign_newspaper_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/fixing_car_air_conditioning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40484dc1-eb28-4509-a155-427f3dee384c/74096058632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e8697b-d2cc-464f-9579-70a72f36dddf/sozikominuzapoguvobam.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_off00014e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E00 5396 bytes
SHA-256: 6d5e7a4af322d28e3630bda60bb52e7238b6ecf6320eefefe26681d09be1ac49
font_01_sfnt_off00016049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16049 10644 bytes
SHA-256: e411c07fffc11ba458befa082839c3deb4437865c33a05897199cc2fb5a6ee22

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