Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbd57362bc8ced3…

MALICIOUS

PDF

104.8 KB Created: 2021-04-03 16:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: afe236ddb420c0526f1b794b968e15ea SHA-1: b1f593074139dc27ff39c2d8e1d81b55c878cba2 SHA-256: 5cbd57362bc8ced3c7f5e23a7dc499fd76a375a4fb3545a80d2d2edbd68d5c4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://crophysi.ru/wix?keyword=monster+hunter+freedom+unite+guide+pdf PDF link annotation
    • http://olymptrade.buzz/when_will_texas_campgrounds_open_in_californiam6il0.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/hb1iaih/withstandz_zombie_survival_pc.pdfIn PDF document text
    • http://homeolimp.com/40452960610s71lj.pdfIn PDF document text
    • http://hookup682.site/dawn_of_titans_apk_hack51nb3.pdfIn PDF document text
    • http://options.expert/97625175451p7nn1.pdfIn PDF document text
    • http://gk-kuban.ru/what_causes_hand_nails_to_split18f1m.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/lxYGf2f/url_rewrite_2._1_offline.pdfIn PDF document text
    • http://werenntaq.online/constitution_day_worksheet_icivicstqsp3.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/gdsgc7b/95074049437.pdfIn PDF document text
    • http://habercigo.com/kuwuwavotagawidifopokofbwks2.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/24241348266.pdfIn PDF document text
    • https://cdn.sqhk.co/dirotiweze/bjjVidi/run_2020_release_date_hulu.pdfIn PDF document text
    • http://begdas.space/dr_seuss_books_read_to_meldksf.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/active_site_definition_biology_bbc_bitesizetvu4f.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/90862353608.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/fihhgeo/music_events_barcelona_may_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_5e114e5e698d4ff3b4907c0b7b4085fe.pdf?index=trueIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/favibifedixiga.pdfIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_dc0c247b774446faa990bb7dd30eecec.pdf?index=trueIn PDF document text
    • https://fb4bdcd3-28a3-4206-a6c3-fb267f511c23.filesusr.com/ugd/0ad562_aa053da394a04109b2f2bfaad67751f6.pdf?index=trueIn PDF document text
    • http://tagijonegularol.myartsonline.com/unir_varios_en_uno_solo_adobe_reader.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_5a6b78d7dff34326bc467a7cf6e50e38.pdf?index=trueIn PDF document text
    • https://94226b1b-8363-4ad6-a779-e61b7b16ff5b.filesusr.com/ugd/b3bc21_217ab9e108584519a026e45a351af8b1.pdf?index=trueIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_0e1b8c54510145e8bcec7b244c5e5dce.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001425f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425F 7752 bytes
SHA-256: 2b986b3050ccda931e8f8b11701631952e231e306dcd0b0404a17d89561af466
font_01_sfnt_off00015ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CE2 5220 bytes
SHA-256: 7aeb2a8889c11d8837bb7cb107c141f69b0041ab1eb3d96e7265bd987dce1552
font_02_sfnt_off00016e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E88 11640 bytes
SHA-256: 6ac7980dbb8ba9be7d509bd90e4cc07a76b1f50f80176e3bd63a7e84eb1c36c0