Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8de2e85830aace…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 13:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0c448044d487c56e258c1ce2d6dcffa7 SHA-1: a0c227292ea619078826834dca9341f8a5aae7c0 SHA-256: af8de2e85830aaceb78299e817dc603cb851c6514fc899741e1e122abe309740
136 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests the document is designed to redirect users to potentially malicious sites. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates that commands or executable names were found within the document text, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://leonvi.ru/award?keyword=advantages+of+online+advertising+pdf PDF link annotation
    • https://cdn.sqhk.co/dopuwene/dVhihaM/download_tiki_kart_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xeviremal/1ghNpGd/yellow_crafter_scrips_shadowbringers.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/cij6NUW/frases_tumblr_de_amor_propio.pdfIn PDF document text
    • http://zanupolema.iblogger.org/biotecnologia_na_agricultura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_602c1e2b5857d.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/jgfLhbG/lower_river_road_transfer_station_vancouver_wa.pdfIn PDF document text
    • https://cdn.sqhk.co/digipexula/hhagcDP/boy_hairstyles_curly_hair.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385009/normal_5fefe3bfd51e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/43In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2ce856-5290-49c1-a9fd-4c20bf7e6d66/678944343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ac25d1-bdb3-4334-8e98-d9aff508873a/how_to_relieve_side_back_pain_during_pregnancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf1f51e-889f-489d-b803-a2cf78ec0063/how_to_become_a_psychologist_salary.pdfIn PDF document text
    • http://jobifizokugo.rf.gd/95472591690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c28392-0c77-4d64-99a9-2ffa19c185d0/40_rules_of_love_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc5171bf-9c7f-4bbd-8a62-113f08fd0573/rupefewarereretaxow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce4523be-5a9b-4e86-8483-7840f1a66a3e/safety_plan_domestic_violence_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2d8c05b-35fd-4900-a38b-056cc5a53034/how_to_host_at_a_restaurant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ff11e7-a337-4b94-97e6-51e3aad4caee/5573936375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/532bbb22-eb33-463b-84c7-d7067b42def7/washington_redskins_new_name_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06e74d5-913f-4c92-8a5a-8f614db9ba2b/runejugedesoxumipora.pdfIn PDF document text
    • http://gaguvibetiw.epizy.com/edit_text_free_mac.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/43e4007f-7fbc-4531-a75c-5c6e1319a4fd/31241457707.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_off0000ec84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 5256 bytes
SHA-256: 50e68d351ee69ea950cfee7791e2570c65cd41285b3f3b9f1a3da8123e750c87
font_01_sfnt_off0000fe82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE82 10148 bytes
SHA-256: 108da785be7f66d6ebf694ab76e2654a123ed827e2c15009cf5edff59557a155

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