Malicious PDF — malware analysis report

Static analysis result for SHA-256 83d215032b7c13e3…

MALICIOUS

PDF

78.0 KB Created: 2021-04-10 01:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e859ee3664b35bac4a60365caeee47d SHA-1: 953201a81e6b3e7b886a0d887e244aa4daaa1a72 SHA-256: 83d215032b7c13e329be48c604fa61b6a0890442a311973bbef52749d3d64266
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 0.9996

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://golowaki.ru/strik?utm_term=how+to+run+a+5+axis+cnc+machine PDF link annotation
    • http://giocodigital.space/30040685438cauc0.pdfIn PDF document text
    • http://soldonlakewood.com/xusuxirixalakuruo81ih.pdfIn PDF document text
    • http://kengoru.space/fishing_hook_knots_bestfmjx0.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/caballo_de_troya_9_jj_benitez.pdfIn PDF document text
    • http://creditreportfast.info/sovusaduv9arfr.pdfIn PDF document text
    • http://tehnotop.site/pisabejereloz94cm4.pdfIn PDF document text
    • http://jebebixazonutug.mypressonline.com/estudios_de_casos_y_controles.pdfIn PDF document text
    • http://vorecan.fun/36999723687zast8.pdfIn PDF document text
    • http://nafuvexozoli.iblogger.org/34050066140.pdfIn PDF document text
    • http://lasinonid.iblogger.org/40k_tyranids_codex.pdfIn PDF document text
    • http://artrosil.xyz/gta_sa_hile_mens3m0um.pdfIn PDF document text
    • http://1-bog.ru/plantronics_bluetooth_headset_connect_to_phonewzy40.pdfIn PDF document text
    • http://airned.ru/725010107658wn58.pdfIn PDF document text
    • https://sivipafegedijog.weebly.com/uploads/1/3/4/4/134443607/koguvu.pdfIn PDF document text
    • http://missunik.space/zodoxoxesapusosumapugo6o5rn.pdfIn PDF document text
    • http://nisaledax.iblogger.org/aptamil_pro_expert_rossmann.pdfIn PDF document text
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/movotubo.pdfIn PDF document text
    • https://tigixunejalimiw.weebly.com/uploads/1/3/5/3/135315438/zumewafepazak.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/asteraceae_familyas.pdfIn PDF document text
    • http://tilosag.mypressonline.com/jafosasajeso.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
    • http://pujigiberaxu.epizy.com/craftsman_lt2000_mower_deck_parts_list.pdfIn PDF document text
    • http://roruvavaderej.epizy.com/logitech_r800_mac_setup.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_off0000e7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 5136 bytes
SHA-256: a38f7723033f5b42fec8221b93cd21a49c277b99aa20aaf72091cdfdbf867fc3
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 10388 bytes
SHA-256: ed696e16e7736961c54bec5d301ea67c641a53b9c21691824ae71e1c44fafd31
font_02_sfnt_off00011cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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