Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dae94c8ff9cafeb…

MALICIOUS

PDF

76.1 KB Created: 2021-06-03 16:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4e6e72e9b3e982b271cb3b74d448d067 SHA-1: 9d5e6f9ecfa731d412fbb076d35781a171fa26b8 SHA-256: 1dae94c8ff9cafeb5bf6b639ca7d0735014a0d267a290e8316cb1f9a9ffd3841
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://allytemp.ru/pbw?utm_term=how+to+turn+off+a+whirlpool+double+oven PDF link annotation
    • https://nufirejibojo.weebly.com/uploads/1/3/4/6/134645492/popizuneb-rubebomudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_6054c23614d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_60327ae34ade4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5fe4d9983561f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461791/normal_5fed1a33e2ef6.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/segoma.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/5201ee86977a16.pdfIn PDF document text
    • https://velumosatowe.weebly.com/uploads/1/3/4/8/134883763/c737dcceb.pdfIn PDF document text
    • https://jurisosisirebak.weebly.com/uploads/1/3/6/0/136086550/dawotivifuzazun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448121/normal_601bcc36294a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_60323977eeeee.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
    • http://kakexigodelo.pbworks.com/w/file/fetch/144546681/cheatbook_database_download_for_pc.pdfIn PDF document text
    • http://nerobedevu.pbworks.com/w/file/fetch/144458367/bts_new_song_2020_dynamite.pdfIn PDF document text
    • http://kufogokoges.pbworks.com/w/file/fetch/144462366/degufilixeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82df371d-c732-4a1a-942e-b1a80f54c16f/poganizij.pdfIn PDF document text
    • http://kibumezi.pbworks.com/f/nuzuvariferit.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144560076/bavanosoxigevajebiniw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e4cf8fd-a64f-4d8f-bbaf-b59419b61abc/ridgeway_grandfather_clock_wont_stop_chiming.pdfIn PDF document text
    • http://vulazojab.pbworks.com/f/refipiditumipaxazawuvuvuw.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/f/fundamentals_of_physics_halliday_resnick_solutions_manual_10e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bc7d2b-2e07-4b56-ba9d-49e69e2502b1/losing_my_virginity_richard_branson_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/661bfe06-6f33-4ab1-9215-3a754e7f0722/what_are_three_examples_of_non-verbal_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073e81b4-6f33-453f-82f0-7da1c82c9a02/pofevuxirizinomalak.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_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 5084 bytes
SHA-256: 1def964f1cc9b1612d0375377ed1bad79e7e7ff1eb568c243cf3677859042d23
font_01_sfnt_off0000ef56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF56 11004 bytes
SHA-256: 39c7b8bcae075bd93fb6c1445870b1e2fded1d16b85f04fd0678dc705a9233c9
font_02_sfnt_off000114c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361