Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3be08a4f187f82b…

MALICIOUS

PDF

120.6 KB Created: 2021-03-25 00:34:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a62f627bbf19606a1015f19e6315a451 SHA-1: ceb690b50a119c26f08af65aa73bbfc8cafe6e24 SHA-256: c3be08a4f187f82b80ffecface20433b70fd4ea55e0c8f24688d4e5638746cec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain associated with phishing. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/strik?utm_term=define+invisible+hand+in+sociology PDF link annotation
    • http://gojoges.iblogger.org/chromium_embedded_framework_source_code.pdfIn PDF document text
    • http://pevawafo.iblogger.org/26513089924.pdfIn PDF document text
    • http://kitazixozakabu.sportsontheweb.net/braun_thermoscan_3_how_to_use.pdfIn PDF document text
    • http://jokidinavefo.22web.org/11997842019.pdfIn PDF document text
    • http://axecheat8.xyz/rezumoby78i.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/fadekovekukujazevebodozug.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/financial_statement_analysis_and_valuation_5th_edition_amazon.pdfIn PDF document text
    • http://procripton.com/zulorukutedoxivazev3rkl.pdfIn PDF document text
    • http://alcexpress3.xyz/the_breadwinner_book_3uajfu.pdfIn PDF document text
    • http://reduslim-officialsite.site/pawosanodqy1gy.pdfIn PDF document text
    • http://edaeda.moscow/rapuwizoxekuruforilu3r18.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/5._snf_blme_ilemi_testi.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
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_bbaf0134787d469b91bfdda1ac63d6f9.pdf?index=trueIn PDF document text
    • http://surubaf.epizy.com/56571108930.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/bncc_educao_infantil_2019_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb53911-751a-4a15-ac96-39428f00acf2/skyrim_how_to_change_load_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede8b2ac-7304-4cc1-be71-8cf5ae00baaf/construction_safety_supplies_buy_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e999afe4-fb4d-4081-918a-db0d31f66a2a/which_is_an_example_of_cooperative_federalism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19e5514-8eb4-426b-a9ec-e3fa22faa4c6/tricky_twenty-two_a_stephanie_plum_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/68226880533.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/diagnstico_laboratorial_da_anemia_falciforme.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/nofiniwon.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/pradhan_mantri_awas_yojana_gramin_apply_form.pdfIn PDF document text
    • https://fc060a1e-8c1d-4b7d-bafd-75f79d4c6355.filesusr.com/ugd/c0a468_30f1bbca6e7f423bb2c548084d23f3e9.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170BF 5196 bytes
SHA-256: 0d853d72b1c9fed95d25ccb2b38ba70198d178c5ea47c3a5dcbf4c70b59153d0
font_01_sfnt_off0001826e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1826E 13956 bytes
SHA-256: cc9711bc7c62448dcb77ad6e9ca7cbb7e2445702b4786611b2260e0cb7cded10
font_02_sfnt_off0001af63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF63 16204 bytes
SHA-256: 768f1ffec7ca880e4e313075df677b9297118a1c07a36108573c697d21c55de2
font_03_sfnt_off0001c4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4B0 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71