Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a5a037e2e93308…

MALICIOUS

PDF

95.8 KB Created: 2021-04-03 12:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6136e3959e1cafe08e046a55d8c76274 SHA-1: 951dbff6c9fd6ae119f44f77466a46fa6dfd91ff SHA-256: 01a5a037e2e93308675c96df146b12a6d24a934a65ff797115d400749d9e12c5
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-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.
  • 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://jumiwimov.ru/123?utm_term=american+answering+service+reviews PDF link annotation
    • http://loziwazekon.medianewsonline.com/31287853363.pdfIn PDF document text
    • http://checkmycredit.info/16375397002r8lpi.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/after_effects_expressions_marcus_geduld.pdfIn PDF document text
    • http://legiontry.online/wubipikelamotumonosusukuddi78c.pdfIn PDF document text
    • http://mritzoliver.design/17658099928dfexo.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/mefojulavatobiroseri.pdfIn PDF document text
    • http://fopasezexelori.iblogger.org/angry_girl_whatsapp_status.pdfIn PDF document text
    • http://tupujetu.sportsontheweb.net/free_marathi_books_download_file.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/80491943313.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://uploads.strikinglycdn.com/files/54b962aa-a3bf-4d8b-9fcb-330193cc1212/43779113824.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/behavioral_economics_edward_cartwright.pdfIn PDF document text
    • http://vadeduvizutiv.rf.gd/7th_grade_math_worksheets_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c0efb7-c290-4602-b852-8f454584034b/belepopolonugejejoxunamej.pdfIn PDF document text
    • http://venukaluxe.epizy.com/ireport_windows_installer_5._6._0.pdfIn PDF document text
    • http://busimutu.epizy.com/lunojuxovixunirejonuw.pdfIn PDF document text
    • http://zoribele.epizy.com/how_much_resistance_does_a_bowflex_have.pdfIn PDF document text
    • http://bazoniwawore.epizy.com/berlin_bus_route_map.pdfIn PDF document text
    • http://noxudovo.rf.gd/25732399687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2a1bc4-7981-484f-9a7d-c40d231df13f/whirlpool_wtw5000dw1_service_manual.pdfIn PDF document text
    • http://lelikerakovet.atwebpages.com/crazy_little_thing_called_love_queen_chords.pdfIn PDF document text
    • http://morubuzis.rf.gd/williams_hematology_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e24f89-eb5a-415e-9e21-03d927bc7d69/what_is_considered_a_medium_sweet_potato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90c664e-8858-43fb-a806-8bcbf759dfee/where_can_i_learn_to_be_a_sniper.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_off00012dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD7 4828 bytes
SHA-256: 761bc815870dc84c35bf80595fdc4e1158f8d4e75dd5ea4cee64ba437d89b8b1
font_01_sfnt_off00013e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E1E 11016 bytes
SHA-256: 34044110d2178d74ae5a2e67e90d63a20dbe2391f36317a8f3bfa43f430a3d92
font_02_sfnt_off00016398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16398 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2