Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5e7b6382a1b569…

MALICIOUS

PDF

100.0 KB Created: 2021-03-24 13:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: acd7cb626e4dd123606ded53172e8c66 SHA-1: ab23a488142d5c6a8bf766deda78e42065072313 SHA-256: 4b5e7b6382a1b5693539568387b1d773e016b7a61372e5cbd8a52f5f6d96e110
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or spamming operation. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on potentially malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/award?keyword=define+biodegradation+pdf PDF link annotation
    • http://rudovatimokasum.medianewsonline.com/larux.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/sat_math_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/jogibigeda/jPxRMGL/petijapowimexaziguguzil.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/hahfVij/kojidasebikuninazuruvul.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/hBhdjcY/spirit_halloween_coupon_barcode_2020.pdfIn PDF document text
    • http://jofijuke.22web.org/xobizexedibak.pdfIn PDF document text
    • https://cdn.sqhk.co/badiwugaleko/htJDidL/analytic_geometry_drive.pdfIn PDF document text
    • http://setafugeridol.scienceontheweb.net/26566330113.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/dutimajizowa/59526161324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c5dc1d-3d42-434b-b037-0eddbd2cabcd/cognitive_behavioural_therapy_for_dummies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5446e7b-a13e-420c-b351-932818e6c824/niwatedij.pdfIn PDF document text
    • http://xodijofo.epizy.com/what_words_begin_with_em.pdfIn PDF document text
    • http://rodedewezijore.atwebpages.com/kulodup.pdfIn PDF document text
    • http://duzixaludu.rf.gd/biology_book_10th_grade.pdfIn PDF document text
    • http://xipijoxog.rf.gd/27413765456.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/h_pylori_treatment_guidelines_2018_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be131c04-47d0-45e1-aea9-f1dbd9acb5a4/44817979883.pdfIn PDF document text
    • http://nonozud.rf.gd/52986672948.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/believer_piano_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/i_am_coming_home_song_wrestlemania.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517f111a-733b-4498-9fef-64a5972cbbbc/what_is_shooting_an_elephant_about.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/bibezitamafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf69a48-d18f-4a2b-a99b-53f35a27a2da/resumen_completo_de_romeo_y_julieta_en_ingles.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_off00014808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14808 5136 bytes
SHA-256: 2df4bea8e6ea9215d80ffb902f74bd7b6db6d701d49a9b7b8a53d9dd124b0bac
font_01_sfnt_off00015992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15992 13136 bytes
SHA-256: cc63a9bbdedaace8bcf0623f9bd4557833701f35478e4e889bf30a58bffa8d6b

Open this report in the interactive analyzer, or submit your own file for analysis.