Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5edc23c95175254…

MALICIOUS

PDF

80.6 KB Created: 2021-03-11 16:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 226ad183c1320ca500a6f336737d9946 SHA-1: 59da3c9706da104f388c7029a94afa2c641155fd SHA-256: e5edc23c9517525422c5c908da5c6e85033a17ebae6e6a35812ade99f116c17f
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 0.9997

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
  • 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://lozipotod.ru/award?keyword=40k+codex+pdf+vk PDF link annotation
    • https://cdn.sqhk.co/guzowozuk/geJicja/ragibedexuwekadakodewugo.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/xiaCijp/mipozixobukaliwejuxo.pdfIn PDF document text
    • http://dodemawaj.iblogger.org/66078490702.pdfIn PDF document text
    • https://cdn.sqhk.co/derilunadine/d10jjhf/kunagisikap.pdfIn PDF document text
    • https://cdn.sqhk.co/sexobivobufo/ijhbge8/slingshot_lead_ball_mold.pdfIn PDF document text
    • http://faligabab.22web.org/pejan.pdfIn PDF document text
    • https://cdn.sqhk.co/xijodepub/WtjiX6M/63602232132.pdfIn PDF document text
    • http://wozonos.22web.org/dibewebixubedapibariburar.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/iaiejbg/83076776062.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bcec08-f0b7-4512-bdfd-b866baae7605/1106897120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/381978e6-cbfc-4fd8-99a0-d67802fef797/74717983175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0610fd6c-0efa-4ef9-95be-2c2aca120a69/3933011515.pdfIn PDF document text
    • http://pizibopiro.epizy.com/stephen_king_firestarter_movie_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6336c58-09b9-4cf6-b741-fe5e37b4a9c3/how_do_you_fix_a_liftmaster_garage_door_that_wont_open.pdfIn PDF document text
    • http://jijekoseme.epizy.com/tutarapirusuvisenuto.pdfIn PDF document text
    • http://talopufakena.epizy.com/pusabinokunetowisige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0562cb20-7002-44ed-861e-d75294790082/joxiduwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edac8086-9719-4e39-98c5-5177035c9f29/41892314768.pdfIn PDF document text
    • http://jenesigafepi.epizy.com/16514649959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221a8cad-fedc-4453-b69c-20a7c95f1cbd/critical_state_soil_mechanics_examples.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA88 4960 bytes
SHA-256: ee9784c8447b846e3214b632960b9386c3a871801dff533e94a7c357427f2c61
font_01_sfnt_off0000fb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB98 10864 bytes
SHA-256: 48e9f29d93d2cbe2170f4df787a25e2d1ee7438ac9cb0b20c7af26893f59896c
font_02_sfnt_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 16076 bytes
SHA-256: 77d0e41b193f2956426f125f137c5665e22c2099967b8d3a504bff5b234847bc