Malicious PDF — malware analysis report

Static analysis result for SHA-256 2328801c62ad592b…

MALICIOUS

PDF

76.5 KB Created: 2021-06-04 06:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bad3ad677e5041b0a41a995ddf8ef046 SHA-1: 80e1d220921c9c964370b441c212ed828968ccca SHA-256: 2328801c62ad592b07ed94c14f90ec3b49ba2d76827375469e2b6ab39aeb9f45
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 0.9994

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://philabc.ru/pbw?utm_term=printable+coupons+for+boyfriend+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4389366/normal_5ff62c7d342dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_600e59e390aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_60263bd83e435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366035/normal_5fccfeb29417d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_602b2c7b056b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_60494193c369e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_603f5a9c0bf36.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/d8fdda58-659e-491d-af35-89633c4bfde6/what_is_the_most_important_era_in_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b76039-1456-46c6-b8df-c53e7fab6db9/7_keys_to_divine_healing_by_kenneth_hagin.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/f/39106679043.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144507936/hermeneutics_principles_of_biblical_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec479a79-c294-4382-8a53-88fe182fefa8/22434741361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed31a8a8-dc7e-40ec-bb31-48fe912a028b/tenetoferarit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa85c4d5-4b1b-48ae-a278-d5b37f849941/the_new_sex_and_the_city_show.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c0733b5-056b-4b76-b1f9-455756d85059/mental_toughness_quotes_sports.pdfIn PDF document text
    • http://nagomax.pbworks.com/f/66420200980.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144425715/dolarofawimemazojavujodub.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/w/file/fetch/144534285/68230229793.pdfIn PDF document text
    • http://kukepofarit.pbworks.com/f/98230014729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ef33ef-6a4f-4f5f-bb88-30531b669861/vinape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4f79ac-3609-44a5-b28c-046ddce3627e/xuwejaxadebunixeruzilino.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144506331/daxifeziretuwix.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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 5428 bytes
SHA-256: bcb13f69360c7d3f3e573b1eb5b99407b7ceab799622c9046602722ee3468351
font_01_sfnt_off0000f3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D9 9952 bytes
SHA-256: f7574ac975da1fcd2f1be3662939ab6c3f89afc802875861a745869c09f3ae33
font_02_sfnt_off000115db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c