Malicious PDF — malware analysis report

Static analysis result for SHA-256 00178562f5bdc671…

MALICIOUS

PDF

74.7 KB Created: 2021-03-30 10:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02e57d27da695105a5b04803b85f4494 SHA-1: 903a0c4236d5922a8135f1524fd3f1fa30bde7da SHA-256: 00178562f5bdc671a8299671ad7c3e1cbcf71daedaa3b769b2f7d99daae16158
226 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/123?utm_term=bios+password+recovery+software+free PDF link annotation
    • http://belofakomag.mywebcommunity.org/1666172542.pdfIn PDF document text
    • http://wuvijenebomukib.iblogger.org/72686834464.pdfIn PDF document text
    • http://togezapavux.iblogger.org/95303769873.pdfIn PDF document text
    • http://xiguxivevov.sportsontheweb.net/banking_awareness_arihant_download.pdfIn PDF document text
    • https://damujulul.weebly.com/uploads/1/3/5/3/135335913/2233346.pdfIn PDF document text
    • https://sudirunerobup.weebly.com/uploads/1/3/4/8/134877260/vurinabaz.pdfIn PDF document text
    • http://kuroramogesok.iblogger.org/fawanitugoguluxejuweni.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/does_google_play_books_cost_money.pdfIn PDF document text
    • http://tulotipokumubo.iblogger.org/aidl_example_in_android_github.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/sign_language_alphabet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2c43b3-ed9c-4eee-9a28-83432c9928f1/what_should_my_toddler_do_at_18_months.pdfIn PDF document text
    • http://vevurikadi.epizy.com/kulajasoganujudomabugozu.pdfIn PDF document text
    • http://fapaxemawa.rf.gd/which_chapter_is_surah_mulk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d900734-b8bb-48e1-ac44-27a7fa77a68c/38524812399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034c7195-1ca7-4b80-8d95-974ab2f536c9/89614723778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4d827fd-729e-450c-b87a-2f6c87719cca/maven_clean_install_multiple_projects_eclipse.pdfIn PDF document text
    • http://jaminuzifibe.onlinewebshop.net/37311866168.pdfIn PDF document text
    • http://kesobir.rf.gd/airtel_digital_tv_channel_list_with_price_download.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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 5420 bytes
SHA-256: 17eb03fa576f2534fe73e6443e9b0256c0b365f4c0682946958e0079bc16d589
font_01_sfnt_off0000f884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF884 11084 bytes
SHA-256: 2917fa8dad5db9a4cf5d25c4fbf843af9fbeee43fb2e6175afba7fd1f2644afe

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