Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb68368f94499703…

MALICIOUS

PDF

80.3 KB Created: 2021-04-06 21:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f018c007fabc7323c7387f3fc4f3c06f SHA-1: 5b2882164d4e68d32fb92669311460956761b350 SHA-256: cb68368f944997036c29271498ac48f03b5de8cad57b567f5cfda6a65159b757
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=morita+root+zx+mini+manual PDF link annotation
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/7497363.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/NjfhhrP/30057363915.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/zadozikuvvqlp7.pdfIn PDF document text
    • http://bemelegevew.22web.org/79859236294.pdfIn PDF document text
    • https://pugufewosanagut.weebly.com/uploads/1/3/4/3/134331363/8451537.pdfIn PDF document text
    • http://wisecredit.info/pacific_fitness_zuma_exercise_chartzke4l.pdfIn PDF document text
    • https://cdn.sqhk.co/tudifemumopi/chbhbhf/zefipox.pdfIn PDF document text
    • https://cdn.sqhk.co/wamitavixitu/I78jbNT/bauer_bodoni_std_font.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/aNheV6U/dexuwupekegeres.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/cKjjihd/27706697301.pdfIn PDF document text
    • https://retezuve.weebly.com/uploads/1/3/2/7/132741149/6984490.pdfIn PDF document text
    • http://lukosewikaj.22web.org/83209364614.pdfIn PDF document text
    • http://liwumite.iblogger.org/vezokilaluzodufof.pdfIn PDF document text
    • http://bosupena.iblogger.org/whirlpool_french_door_refrigerator_not_making_ice.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ebcf1788-8998-48cc-8f1b-45c40a8a6767/zirukonilon.pdfIn PDF document text
    • http://ratazudawi.epizy.com/letter_a_worksheets_for_toddlers.pdfIn PDF document text
    • http://kiromimejobodo.epizy.com/chunari_chunari_song_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91a0cc1b-e8ff-4f6e-8ad3-cec65cd38511/singular_and_plural_nouns_worksheet_for_first_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a35c22-48e3-404f-abc4-2048a0931a14/tascam_dr_40x_zoom_h5.pdfIn PDF document text
    • http://vibilalilabewo.epizy.com/vatafejaromagisejewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2644af85-acd6-469e-b2ed-d74c215dbc7e/44063147707.pdfIn PDF document text
    • http://pazatirademe.rf.gd/fesuxefunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dca9d514-b249-47b6-a335-b45807d1175b/grove_manlift_operators_manual.pdfIn PDF document text
    • http://tamufigavoxi.rf.gd/color_pencil_drawing_techniques_step_by_step.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1E 4540 bytes
SHA-256: a733b458655aa7792c0337ac36536a32ec40537f6b75be3b233a3b36893e638c
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 11520 bytes
SHA-256: 47a9b3eb4bede3cd040e74c1011c7e1b405293a730bdbfcfbfc9d14d749ddabd
font_02_sfnt_off0001243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3