Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5244104655f35c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-13 00:38:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3a52a99bed2d62371399a7500519f52f SHA-1: 9747d50aa0820a178fde9c6a0a58c6300c84cb09 SHA-256: 3b5244104655f35c2554ce6c1c8def0b4ec5404f116dce3eb1f36e54c6b4a280
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. It uses an urgency-based lure. 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 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/wix?keyword=thomas+cook+flights+jfk+terminal PDF link annotation
    • http://smotrikino.fun/pdf_file_converter_apk_download9uoww.pdfIn PDF document text
    • http://domainlimax.xyz/rufilisavezarakurd5h0z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409239/normal_5ff5279c1b520.pdfIn PDF document text
    • http://komarovskii.xyz/65353507036tyytn.pdfIn PDF document text
    • https://jirakeleda.weebly.com/uploads/1/3/5/9/135992973/xifupolutorulu_votusubuxipix.pdfIn PDF document text
    • http://goshop32.site/carretera_arena_gorda_punta_cana_republica_dominicanaurri1.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/pelel.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/djakYjg/golden_dragon_restaurant_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/GgfKpii/banana_runtz_jars.pdfIn PDF document text
    • http://xitnet.fun/865479870474cfuo.pdfIn PDF document text
    • http://my-favshopg.online/tangram_puzzles_freegvf0m.pdfIn PDF document text
    • http://legendbilisim.com/hitchhiker_s_guide_to_the_galaxy_robotrj08y.pdfIn PDF document text
    • http://sodalabs.pro/android_one_xiaomi_redmi_note_5adz5x9.pdfIn PDF document text
    • http://parrrtner.xyz/99196025310pzkgh.pdfIn PDF document text
    • http://localdesign.me/chiku_chiku_boom_songdbpz3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 5384 bytes
SHA-256: 5d04555dc288293cfb56782de4bf0a57a9a5f4bed8577001d66df3aaf35c2df8
font_01_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 10612 bytes
SHA-256: 076db959f81f8abc9d4fcd07ca6b210f168a1872252c1fb3ed20808ec0584da8