Malicious PDF — malware analysis report

Static analysis result for SHA-256 2509efda4caa6ca1…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 09:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: cc93175e902badc3569248af5ceb9f4a SHA-1: ec3b8eb65e3bf0cbb718d07145a3331d4a1fcddc SHA-256: 2509efda4caa6ca1747f1fdbda723189774198f8643d8810e645576cde05fef0
126 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a link farm on disposable hosting, with a primary external URI pointing to 'https://lozipotod.ru/strik'. The document body, though heavily obfuscated, contains text related to a Sony DVD player query, suggesting a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=can+i+use+my+sony+dvd+player+without+a+remote PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496584/normal_6028ee0ae1cf5.pdfIn PDF document text
    • https://vufosaxirit.weebly.com/uploads/1/3/4/0/134018891/bubax.pdfIn PDF document text
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/3702211.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/autocad_assembly_drawing_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5fdd3197bcde9.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/89808753130.pdfIn PDF document text
    • https://gavedomosuzutu.weebly.com/uploads/1/3/4/2/134234743/6315381.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://s3.amazonaws.com/seriposuj/bowowutupipasavagana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc0b7e1e-3a75-42bf-a2fe-43c598712a0f/how_to_set_boundaries_in_your_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/sheet_music_erik_satie_gymnopedie.pdfIn PDF document text
    • http://kujujigufa.epizy.com/45702254166.pdfIn PDF document text
    • http://zutuzus.rf.gd/57028211422.pdfIn PDF document text
    • http://wakotirinizevuw.epizy.com/wipapebosetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a715b79b-d5bd-46fc-b075-554cbbb2c9c8/reinforced_concrete_shear_wall_design_example_bs_8110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f461e04f-5b46-4b2f-b852-b81da22ac69f/58257167355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d9975d-96a4-4982-94e0-04d055f3d286/sonar_platinum_metronome_no_sound.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_off0000e7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CC 5360 bytes
SHA-256: 2cf9d49a53d38b8aa494618293d28e5556a2fe5b180c859e5ebeb66685dae46b
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 11196 bytes
SHA-256: badbfca430ca148fb88646c786a246a6dcb267a6921157677c50b872eddfc687
font_02_sfnt_off0001201b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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