Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e26b40ea3f2264a…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 00:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 86893de93719f06900464c6cd653ccf0 SHA-1: ec08660ee73d247e58fab8eea3b4c42d8ac526fe SHA-256: 5e26b40ea3f2264a8aaba4fca02abf95408f3d17bc3a6345b486e290d6d57c67
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 0.9950

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/wix?keyword=pott%2527s+puffy+tumor+child PDF link annotation
    • https://cdn.sqhk.co/suvotoruwot/jbjchak/30512575598.pdfIn PDF document text
    • http://titodisoke.22web.org/gavevado.pdfIn PDF document text
    • http://diposiz.iblogger.org/50011781296.pdfIn PDF document text
    • http://fuxakuzaporelu.iblogger.org/loxopo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_60391ced73de1.pdfIn PDF document text
    • http://sojekobab.22web.org/bavorolor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_6016fa75a84ba.pdfIn PDF document text
    • https://cdn.sqhk.co/xotakuzazuf/ggbmcSu/56424158666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_60294bea28c98.pdfIn PDF document text
    • http://konufij.22web.org/714010545.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/9jfggji/kazoxisodu.pdfIn PDF document text
    • https://cdn.sqhk.co/wukufazujuv/iAiishg/19625861270.pdfIn PDF document text
    • http://tepuragebu.iblogger.org/bicameral_conference_committee_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_5fd2a97b3a46e.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/bjejjij/bijuzipefukorako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412158/normal_6020408e28ad7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_051b18f462994c79aed39407d8369af3.pdf?index=trueIn PDF document text
    • http://pusumugag.epizy.com/79248115394.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_77f00bc1cd654e3594aec86c4957c43f.pdf?index=trueIn PDF document text
    • http://keziragaxepor.rf.gd/zijodekosibuxa.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_bd11540484ba4d4794e1f4845196fe97.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aabffb36-34c2-4d61-8b8c-3c021f97d5a3/16148310177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f159f906-34b6-4771-a9f5-52b88e4ff8bf/hp_probook_6555b_factory_reset.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_8a855ac6b782448eb7c2cb7688f268cc.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_1038ec6fbb1f42e3a4f91587e688e269.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/25557962-ec23-4042-8074-e716310d88f6/9097878388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39df81ec-1096-4c7b-b202-047961e3e803/story_of_the_other_wise_man.pdfIn PDF document text
    • http://vulixinezewal.rf.gd/55050561714.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_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 5320 bytes
SHA-256: 3a479cff71b5104b12e0070866756152fd2b6bd7ae8932f2bb56709e64c3e2fe
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 11164 bytes
SHA-256: 72a9e6950f0a605ffbc33fe4fe13bb6977ab7818a9dac623996523fc2e63cf8f
font_02_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953