Malicious PDF — malware analysis report

Static analysis result for SHA-256 c746a9e3e4c2cbd0…

MALICIOUS

PDF

73.2 KB Created: 2021-02-17 01:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 765ccec64e010115faeea2d36e0b862b SHA-1: 8bc7d787a14f5998c7f743db609dadfc7d99d922 SHA-256: c746a9e3e4c2cbd093b6df8c06b737bd01832816c6e1786b65b25ee5b6611318
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 0.9998

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://maypoin.ru/aws?utm_term=backward+design+lesson+plan+example PDF link annotation
    • http://rameautbxy.space/lapus9qmhz.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/voxosezusug.pdfIn PDF document text
    • http://good-production20.site/stanley_fatmax_knife_manualcks4t.pdfIn PDF document text
    • http://reduslim-buy.site/eutanasia_pasiva_y_activawagxy.pdfIn PDF document text
    • https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/223b34d5b373c.pdfIn PDF document text
    • http://spainsale.pro/dibujos_de_la_creacion_para_colorear6u0ew.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/51f754578aa0.pdfIn PDF document text
    • http://xurivikarode.iblogger.org/nokobizibapozimepu.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/65769000525.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/akshay_kumar_film_kesari_songfc5s7.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/mechanical_keyboard_switchesemxao.pdfIn PDF document text
    • https://lekamenofujilap.weebly.com/uploads/1/3/4/6/134690267/fogazadenoted_mozekuxupimuz.pdfIn PDF document text
    • http://rodsfish.club/bavefupekagoxipivaj3t0.pdfIn PDF document text
    • http://shopee24.site/pawe_pori_hori_borgeet_freenc4rj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vegefosapol.rf.gd/alfa_laval_plate_heat_exchanger.pdfIn PDF document text
    • http://derefoxawuziten.rf.gd/asuran_2019_movie_hd.pdfIn PDF document text
    • http://velumosak.epizy.com/99921490738.pdfIn PDF document text
    • http://lotapit.epizy.com/lobaxekefiraxefezemezomu.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/nedegawosiwowolunaripime.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_off0000e0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 5668 bytes
SHA-256: e26af36f27c4041c8f030eb630acd33af9dc55f9d33a26ea88e81b97e9062487
font_01_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 10388 bytes
SHA-256: c6abea72d0a4acc9645303d683907096b9768c4ef5b58f800460bd1537623782