Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb29610f21402a4…

MALICIOUS

PDF

73.6 KB Created: 2021-03-30 11:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddc3595aa8e36f18b458b3680b0751a0 SHA-1: 35a94f423740486396707e31319faedd8a96d87f SHA-256: eeb29610f21402a474169573bf5ee8e005a9f2e18b43534fb792ee8e2fa556a6
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://lozipotod.ru/123?utm_term=texas+comptroller+edc+reports PDF link annotation
    • https://cdn.sqhk.co/vixawutozama/cjwZhc4/steamship_authority_mv_nantucket.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/44947970759.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/z8SUjdx/promised_land_state_park_boating.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/AhexA7d/vutitalosabuzomuxav.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/WgTLEja/gukena.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/555f300e-6f92-4054-8d9f-5ccab8c307f9/6714694853.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_f3fa43a6c94a4ca9967bce2aa679d881.pdf?index=trueIn PDF document text
    • http://zijapipote.rf.gd/the_richard_wyckoff_method_of_trading_and_investing_in_stocks_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b0f214-bfce-4e07-b7ca-e0b1489bcdc9/sansa_fuze_mp3_player_software_download.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_7d479b0561f148d0abaacb1411f48ef3.pdf?index=trueIn PDF document text
    • http://mubizutoperix.rf.gd/tsi_biochemical_test.pdfIn PDF document text
    • http://maludoxowo.rf.gd/cisco_introduction_to_networking_chapter_3_exam_answers.pdfIn PDF document text
    • http://reguturutomasut.rf.gd/87460968648.pdfIn PDF document text
    • https://a179b4bb-f9e1-4b0b-8685-f881d2afde68.filesusr.com/ugd/0fdb6d_fd36e8fa43b645e6ba6d525cd6bb22ba.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_1c5738851dec4d5da516c5557b0ccc5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4829773f-fbc3-45cf-9220-58897be7878c/how_to_clean_a_microwave_convection_oven.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/sewing_basics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4df3acb-a9e9-4ce6-9066-4d7ad3a6450e/41342911174.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_dd6b50d79ef5427b8a676375c20114d6.pdf?index=trueIn PDF document text
    • https://5984e891-aecd-43e6-866f-efdb297c9c35.filesusr.com/ugd/403565_2b8e5ae7233645ea9223312517efe8ce.pdf?index=trueIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_c3836e5cc1284ae7821a9fd932d17113.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_c285a98451e245748680ba4d82356d01.pdf?index=trueIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_286ed7a0cf1c4f8382dfc0303859493b.pdf?index=trueIn PDF document text
    • http://telebil.rf.gd/parejas_homosexuales.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_off0000e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE370 5236 bytes
SHA-256: 1582ee11d9978c0fe33367d34a5916e915def0e889110b980c4637775037f58d
font_01_sfnt_off0000f527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF527 10348 bytes
SHA-256: 15d563f1fc8271de3c6ffbc92b093283700aaf035ee29272391fe9151fb838a8