Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b631b5dee56791f…

MALICIOUS

PDF

195.8 KB Created: 2021-04-01 20:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7070ed1f2523203552ca2342cdd9207c SHA-1: 9027c4a82ec0128c88fb15a79aea76bc61f13b6f SHA-256: 4b631b5dee56791f3a780d93ad164d97346908ec668ca1eafed0358611e49a15
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The ML classifier also flagged it with high confidence. The document body, though truncated, suggests a lure related to political figures, likely leading to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://ponafet.ru/123?utm_term=breviario+de+los+politicos+pdf PDF link annotation
    • http://confirmyourverifiedbadge.com/124160558360myiq.pdfIn PDF document text
    • http://kitapusowa.22web.org/41318481097.pdfIn PDF document text
    • http://presentinsta.site/topuporudotoseposia08wb.pdfIn PDF document text
    • http://natbeach.space/zomodafolanogotakoluzrq44.pdfIn PDF document text
    • https://nozijuga.weebly.com/uploads/1/3/4/6/134698325/1916939.pdfIn PDF document text
    • https://danigutido.weebly.com/uploads/1/3/1/1/131163693/tetovekegikasap_jopunazubemip_joseki.pdfIn PDF document text
    • http://nijowefipegivu.iblogger.org/oceanography_books.pdfIn PDF document text
    • https://pojirada.weebly.com/uploads/1/3/2/7/132741169/pulirab.pdfIn PDF document text
    • http://daddytestit.xyz/coded_inequalities_questions_and_answers177pp.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/bolusevugofodabib3ll3w.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/9868076.pdfIn PDF document text
    • https://rojilijeliw.weebly.com/uploads/1/3/1/4/131409822/4005091.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad1cdde-e16f-4ee3-811a-42e0f49381b1/repair_car_air-conditioning_pipes.pdfIn PDF document text
    • http://jilawovo.epizy.com/vumugituzuwodevetupus.pdfIn PDF document text
    • http://jozeratajugik.rf.gd/lenovo_y700_driver.pdfIn PDF document text
    • http://busugotuwege.epizy.com/84626183325.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/bsc_computer_science_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9409946-a6e5-4210-8fb8-6b59d05e460f/6518596490.pdfIn PDF document text
    • http://tadudaxejede.epizy.com/characteristics_of_sound_waves_in_physics.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/cambiar_letra_celular_android.pdfIn PDF document text
    • http://repafow.epizy.com/psychology_malayalam_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880b2365-a11f-47d5-a24b-d7ef82b6b5de/3408391341.pdfIn PDF document text
    • http://moganip.epizy.com/adobe_audition_bagas31.pdfIn PDF document text
    • http://savikolapuxol.rf.gd/archery_king_hack_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efaad05-b7c7-4ad0-8d57-fb237c08393d/what_is_the_best_time_to_trade_binary_options_in_nigeria.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_off0002c651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C651 5256 bytes
SHA-256: 246e6a0867c25507c108ec749c4395c8161354ce7b452b183df58e3fe175e9db
font_01_sfnt_off0002d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D849 12700 bytes
SHA-256: ea052ef1348e5dac80b3ae4bd1ed2c6fd06498a5fabd547c7c8648f6a2621871

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