Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bcda66b1e88f68…

MALICIOUS

PDF

83.1 KB Created: 2021-03-31 20:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 26b7965ea8d7689bf60eaa20b7a8c507 SHA-1: 77b079e4be3a7d151bea656f14f94675627381fb SHA-256: 62bcda66b1e88f68a564e1d504cae7211548b96effd62302a31e3baff509487a
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to software requirements, consistent with a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/award?keyword=software+functional+requirements+examples+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422378/normal_60539673ca01e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_601791221b364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_6000498ddfead.pdfIn PDF document text
    • http://devicesprotectionforusers.site/536128280204384v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_6022296095eb1.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/algebra_for_olympiads_problems_and_solutions_volume_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_603895de3a007.pdfIn PDF document text
    • http://presentinsta.online/whatsapp_status_images_in_punjabi48epe.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/what_is_structuralism_in_literary_theory_and_criticism.pdfIn PDF document text
    • http://stnold.com/fowowafuxixoto2r7.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/rimotijox.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.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://s3.amazonaws.com/goveruduzewoxu/77933195057.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_e11beabfa55040a99f34d67ec8cf40be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/kerbal_space_program_mods_installieren.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_388306c1039d4fcbbf851ed0ad77e1ec.pdf?index=trueIn PDF document text
    • http://xujogefup.rf.gd/chogada_tara_song_bestwap._link.pdfIn PDF document text
    • https://7be326e9-a1fd-4761-a84c-83c904220737.filesusr.com/ugd/37e945_93faa3475007432bbe3bcb023d96f2a7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/miledu/22568403773.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_d764f05f80af432f8c4615565d6b1980.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefunupu/zemewizumidaxodifezogexo.pdfIn PDF document text
    • http://wepaxilex.epizy.com/lesafid.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/ashes_remain_without_you_song.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_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 5572 bytes
SHA-256: b4c513522fd2f59d7b73561d931c90cec473d9d5e34c4d7f2ab6f8e12ceba505
font_01_sfnt_off00010a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9B 11188 bytes
SHA-256: 6ba514e76547cd5f57acf703ea47d21f5b2928c0b8305fba6d38be540adac563
font_02_sfnt_off0001309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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