Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6e9cbe43f6aec5…

MALICIOUS

PDF

83.2 KB Created: 2021-03-11 09:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 560204820795950b47fd82a2e9c8dd1e SHA-1: 208677b0199c5d288f2fe4944c98c7f4abccf2d7 SHA-256: 0f6e9cbe43f6aec5a6fbbe2a560ef27aa497ff9717566f51aa0602886e872e26
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 0.9990

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://jottigo.ru/wix?keyword=first+class+scout+badge+requirements PDF link annotation
    • http://getcreditreport.info/project_portfolio_management_definition_and_examplee2ls5.pdfIn PDF document text
    • http://familyit.info/cnc_programming_classesexeoh.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/jjk4ujb/vozipa.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/mXhhtgg/death_note_screamo_intro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_60324bbc8684c.pdfIn PDF document text
    • https://cdn.sqhk.co/xoberuweri/3jgiejd/ap_european_history_crash_course_book.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/hbwjaH8/hachi_express_japanese_grill_seneca_sc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386851/normal_5fe56d26504c2.pdfIn PDF document text
    • http://physcoo.com/87370033859azo3b.pdfIn PDF document text
    • http://zatoboyvibor.fun/literary_criticism_lens_definition9wpgo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_601b88a698e49.pdfIn PDF document text
    • http://jopalebifu.iblogger.org/call_by_wifi_android.pdfIn PDF document text
    • http://mifopevoruroga.22web.org/coffee_shop_business_plan_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/g8pm7He/davazise.pdfIn PDF document text
    • http://ek-arenda.ru/computer_systems_analyst_job_description_uscisf9hqd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_f64801cae31545538f2d3af879bae589.pdf?index=trueIn PDF document text
    • http://nobegizoginipe.epizy.com/never_gymless_workout_routines.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/batman_killing_joke_comic_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/musculos_agonistas_e_antagonistas_tabela.pdfIn PDF document text
    • http://xelewesepogov.rf.gd/54818764422.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/lifisiselopiwumesoro.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_290cfe2c4406496f96f78a360cb3ccec.pdf?index=trueIn PDF document text
    • http://busojez.rf.gd/tagaxijidedokoneneraboji.pdfIn PDF document text
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_18725b2f81a04622b351337cc6d9bd53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/how_to_take_battery_out_of_rca_tablet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 5360 bytes
SHA-256: 44dc2e8125b509bdd542fe2c0d73872b3cc359471ac471ea90b4d1adf1a5dfa8
font_01_sfnt_off00010bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB8 10732 bytes
SHA-256: 295816e281b8776ca2c680bbddd3720490e2d064b4593543e73ca6f09d61e195
font_02_sfnt_off00013070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13070 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34