Malicious PDF — malware analysis report

Static analysis result for SHA-256 14feee2512a0bb4b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-04 16:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 31bae527186ff92851093f244846bc76 SHA-1: f4e539dc236b26dca85748f8cae1b038e457885f SHA-256: 14feee2512a0bb4b7f78a3b18cf0df50d8026758b6fcdcd2b1e76619bebb501f
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, likely a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/wix?keyword=rosetta+stone+worksheet+answers PDF link annotation
    • http://pobadabodoz.scienceontheweb.net/kutisademalozizipila.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/geidaQk/gatevosutizetijovotuvikux.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/wavixorojebok.pdfIn PDF document text
    • https://cdn.sqhk.co/fetuxudo/idifhbD/universal_paperclips_game_unblocked.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/jaboledobixifigeturozibex.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/what_is_the_significance_of_the_rose_in_the_little_prince.pdfIn PDF document text
    • https://cdn.sqhk.co/voxedijudibo/ic6sfoy/best_cooking_games_for_pc_free_download.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/fojixeruroraja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazetotunoju.epizy.com/free_printable_ea_phonics_worksheets.pdfIn PDF document text
    • https://c301b42c-deab-4116-afcd-a09dd0728425.filesusr.com/ugd/4bb894_259eebd19b5b451aba85bb4ba52bfe31.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_53008c6699b444e797c904531b991089.pdf?index=trueIn PDF document text
    • http://bagugexasorip.myartsonline.com/rapeniziripobugakuko.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_c24fc96c053346ebaa9bff45ab8b8333.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_df0d89be24cc4211b8a2db908909f0f9.pdf?index=trueIn PDF document text
    • http://pumuroxojab.rf.gd/ponutezigepi.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_f490b425d40a4c38b665b6b4523393c2.pdf?index=trueIn PDF document text
    • http://kesobikifa.epizy.com/pixotadejumoferefu.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_c719af7898bd468690fe7f53ce234acf.pdf?index=trueIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_2110094cdfc648098395e8a03882354b.pdf?index=trueIn 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_off0000f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 4904 bytes
SHA-256: 6bacfab8c02b633dd81a7e1faacb249432bef11fc6e958a77c2dc24ef8cbc34f
font_01_sfnt_off00010710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10710 10644 bytes
SHA-256: 320aa0e5a05ab63f72fc1589f7617240593abd6c41851f48f5619ba0128aac1c