Malicious PDF — malware analysis report

Static analysis result for SHA-256 a35a230555146172…

MALICIOUS

PDF

87.4 KB Created: 2021-03-15 08:00:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e93f0ad3f2e726666be0b1314e26aeb3 SHA-1: 8b042ad1f85df73cb0509ed712db57799c216481 SHA-256: a35a230555146172327700f35cee687410e537dddba7820a1b720058ffc19294
196 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9985

Heuristics 6

  • 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pelibifir.ru/123?utm_term=icloud+unlocker+tool+v2 PDF link annotation
    • https://lepatoketi.weebly.com/uploads/1/3/4/7/134732542/2098405.pdfIn PDF document text
    • https://jasesinokez.weebly.com/uploads/1/3/1/1/131164090/jixofemipe_zelixav.pdfIn PDF document text
    • https://nubavusixid.weebly.com/uploads/1/3/5/3/135348304/wizubufidivodiro.pdfIn PDF document text
    • https://dapavivilo.weebly.com/uploads/1/3/4/8/134895477/4285102.pdfIn PDF document text
    • https://xifanelisiwokof.weebly.com/uploads/1/3/0/8/130874433/pefazokojavux.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/rikizotip.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://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_ef6aa8fe72b74681a5ab855ccc918df3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/50ad90d2-98ad-4773-b1e0-e1474c0cf6d7/57054086604.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_0fa4d8acebed407f94d23053cc8a9588.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/vijodirakutodejuxo.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_a68c501bbea84b4fa8d187cd06b35d50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/agriculture_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/kedetetavelosogogilabuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc666ebe-7a58-4261-889e-4ac67cfad24e/como_homologar_titulo_secundario_en_espaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fecc0d52-8b5a-4c93-a4b6-0261d75ecc29/sas_ods_rtf_no_date.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/55433855117.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/revit_keynotes_filter_by_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff4a9ed-fbab-4e00-9011-710f4055f337/hamlet_full_movie_1996.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/97513345464.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/kojajo.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/can_a_sump_pump_float_be_adjusted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98269ab6-9247-4e14-b624-16a3f6d3c38c/86392361634.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/39984976409.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46B 4572 bytes
SHA-256: 4fafd38ec2a4c45a9bbcb6006e02241dd8275693a07b6b7cd4c35b8bca3429aa
font_01_sfnt_off000103fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FE 11300 bytes
SHA-256: e58a627081653ed56d127a517f7fbdf7c2d685c77f1fa68113984c601cc79ff2
font_02_sfnt_off00012af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF5 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00014023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14023 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361