Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db3198e1ae97d6e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-18 18:47:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3da249541c883751754ee4e89b937618 SHA-1: ea6dd06d9109828a8603fb48a99316773bf3b324 SHA-256: 3db3198e1ae97d6e2ac0ed4b90ed2f567d910035ecab5ac160b99bd1a628cfd1
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xajibur.ru/123?utm_term=bunny+live++apk PDF link annotation
    • https://pudewufaziv.weebly.com/uploads/1/3/0/7/130739775/dufevosu.pdfIn PDF document text
    • http://axacheat4.xyz/69239807176fuwah.pdfIn PDF document text
    • https://xofoxinef.weebly.com/uploads/1/3/0/8/130874051/1119086.pdfIn PDF document text
    • http://workbykoder.xyz/how_to_program_rca_universal_remote_to_samsung_blu_ray_playergfnf0.pdfIn PDF document text
    • http://pop-marketplace.ru/everyman_a_morality_play_read_onlinew53wh.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/mapa_politico_do_brasil_estados_e_capitais.pdfIn PDF document text
    • http://dronextactical.xyz/jabra_freeway_pricerunnerxcl6q.pdfIn PDF document text
    • http://wajadadajevebab.22web.org/bsc4success_september_2020.pdfIn PDF document text
    • https://vojesegavosoza.weebly.com/uploads/1/3/0/8/130813146/74df8a0ade0015.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/how_to_make_a_bridge_with_popsicle_sticks_without_glue.pdfIn PDF document text
    • http://jevutodirawis.iblogger.org/rawaxanepegosox.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/nafibanefexex/xbox_360_users_manual.pdfIn PDF document text
    • http://xitamedasunur.rf.gd/what_comes_with_ps5_digital_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/18303189046.pdfIn PDF document text
    • http://gebozobab.epizy.com/convertir_de_a_word_nitro_online.pdfIn PDF document text
    • http://siderawe.epizy.com/3492196889.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/2007_bentley_continental_gtc_owners_manual.pdfIn PDF document text
    • http://pugotividat.epizy.com/sermones_adventistas_en_audio.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/carhartt_dungarees_size_guide.pdfIn PDF document text
    • http://lirifamagugo.rf.gd/52078845866.pdfIn PDF document text
    • http://bisumige.epizy.com/clarinet_sheet_music_low_notes.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47C 8868 bytes
SHA-256: d3c9dfb478b4faec7da680b677b5acda962bb26b4fb32f103c90ce4e50a9bf67
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 4816 bytes
SHA-256: a75d471c46e17b5d7694e1eb823998e0244a2b0e4143d7e9814ce5a82cc251f8
font_02_sfnt_off00010c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C79 11100 bytes
SHA-256: b0fb9798b6a00fd10277e32647b2685ca4c5f6377986abb2d3daa9c7d45853e7