Malicious PDF — malware analysis report

Static analysis result for SHA-256 f92402d1de824ba3…

MALICIOUS

PDF

82.2 KB Created: 2021-03-23 23:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 34324848127bdecf96b54149a842f912 SHA-1: 9c4585ee6d1803620ee6ce58496823783c5daf24 SHA-256: f92402d1de824ba364f8cfda443cd83ec68614b1f557ce3f6a71f4eadece6bba
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://resalured.ru/wix?keyword=feelings+and+emotions+in+spanish+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379837/normal_5fff7c988eb98.pdfIn PDF document text
    • http://ideal-it.fun/panchatantra_story_in_sanskrit_with_moral6u22s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5ff438520b134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_603f2488672ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_6036df53a26e9.pdfIn PDF document text
    • http://martans.space/ham_radio_deluxe_software_download3ie3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_60551a85a92b2.pdfIn PDF document text
    • http://hdvideo.design/a_streetcar_named_desire_study_guide_student_copy_answersvio49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_60332cccb0770.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5ff6ab67dc549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_24d68611af344de285fbd3abb70a024e.pdf?index=trueIn PDF document text
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_6f28b877d1db4b10b6f170d831e5293a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/java_offline_installer_32.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/misolurirujamuruvu.pdfIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_619c03188bd449a8bba4c40e885f1458.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_2a2634385cfa44d08543db4045c54b85.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/raj_jail_warder_answer_key_2018.pdfIn PDF document text
    • http://fogobesu.rf.gd/68905586609.pdfIn PDF document text
    • http://nenexotaz.rf.gd/8594001866.pdfIn PDF document text
    • https://054d5c26-596f-48a3-87a7-0fc79031e5db.filesusr.com/ugd/599026_838dc6a23f0c404cb9f050256aad16fb.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBC 5484 bytes
SHA-256: 1906d8bd735e802c3fda0e74250a2ed51166c924069120ea235c03751a34b4eb
font_01_sfnt_off0001104f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104F 12600 bytes
SHA-256: 9b75966dcc0342e3ee40c8ec0ee9f8ea89efd5b90ddb03718495c1dd2e5546e4

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