Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2cd8849cd7c380…

MALICIOUS

PDF

75.9 KB Created: 2021-03-29 22:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5ea65cce98fdfcaaea11b75bb8941f71 SHA-1: 1e5e842fb212fc3dccc5783baebf7a62c3ec3200 SHA-256: eb2cd8849cd7c380b82a434185d36332dc999a1d87bb1b07257d0af0893df5f2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious sites. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/award?keyword=akuntansi+syariah+pdf PDF link annotation
    • http://jusexolapof.22web.org/bank_po_exam_syllabus_download.pdfIn PDF document text
    • http://rerulekoba.66ghz.com/avivamento_adorao_central.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/jujaduroxabi.pdfIn PDF document text
    • http://marketeuro.pro/2794663737763lc4.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/dogosamevijisifagemuw.pdfIn PDF document text
    • http://raftgjgr.space/fikebimowivex1rvk.pdfIn PDF document text
    • http://ledy66.net/how_to_self_test_for_sleep_apnea5bnvb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_c1489c6d3a184c1288c611a1905706a9.pdf?index=trueIn PDF document text
    • http://wobowix.rf.gd/los_secretos_de_steve_jobs_carmine_gallo_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbad7a6-4cee-487d-8e95-14fa94a62484/what_is_healthy_at_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a4515a-376a-4544-9107-e6a1130875c1/me_gozare_en_tu_presencia_jehova_juan_carlos_alvarado_letra.pdfIn PDF document text
    • http://xikisefux.epizy.com/chess_boyaa_catur_online_apk.pdfIn PDF document text
    • http://kamegil.epizy.com/32493046713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7364ce-281f-4027-88d1-6270265bc876/bebelaseduzuleramu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18ad1c39-db55-4fbf-8d3a-37d0d78db7ba/how_to_reset_magic_chef_portable_ice_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df401424-04cf-49bc-8963-665ca6ca9d93/uniden_cordless_phone_turn_off_ringer.pdfIn PDF document text
    • https://f4dd034e-00c7-465c-b850-fb2d75accad5.filesusr.com/ugd/769f78_28203aceae614599980b70747a99aa90.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a2dfaf-d5a0-47fc-bc84-2f2c3e9645a1/12448116699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/289f628c-c470-4df1-93b0-53549c6ce2c8/nevaxiwubelifejodulon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27500dde-ab5a-4b98-bc16-b52c0ef20b4f/diana_her_true_story_summary.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_a5815115274e48c5a464451675802dbc.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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 5252 bytes
SHA-256: 36cce0f018ed1bf535ba806b6cd17e06f256296bd75c58a96fd231a81b5eeaf4
font_01_sfnt_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 11028 bytes
SHA-256: 29f50b1cdeaa73c3b044c7142f66b455d5912a7b822522d055fa029ed2163aba