Malicious PDF — malware analysis report

Static analysis result for SHA-256 10337741ddcd648a…

MALICIOUS

PDF

72.4 KB Created: 2020-11-11 08:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1c09b1227240cbb830725c155895f940 SHA-1: e55582d310edd6454e20228457bc8326e4713606 SHA-256: 10337741ddcd648a6f07e4cfa3fd57dba882984dda862ee74b294b85e137ae14
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URIs points to a suspicious domain, likely intended to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?keyword=san+carlos+beach+inn PDF link annotation
    • https://kafubururi.weebly.com/uploads/1/3/4/2/134235359/volinob.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/vuburofogixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402745/normal_5f935d34c99e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5f959876611a1.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/c7b14fa5-4f61-4693-b1f4-889a58356c72/53214246707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5631f92-25fe-40a1-8854-528315695f77/68111258173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6019361a-b6ec-47cd-a401-ee5e8af05904/peroleworudutukidimowilu.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/abscbnonline_ms_universe.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/detojomituvejami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78cfa411-9567-4a7e-87f5-ab40f1d6c4e1/xedisademibiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df7f9fd-9934-4dac-916d-ec91b3cc35bc/cuisinart_immersion_blender_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/58168349501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd9c7c5-5972-42e5-96a6-dbd23ed3dc2a/sulewejetinam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4debd6-04fc-49e4-a163-1cb74d9406f1/vuzagovizo.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/eos_600d_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/arunima_sinha_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9827e8ca-697b-4626-96fd-b1f1fe9c6466/kizumiruzovo.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_off0000bcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCDC 5128 bytes
SHA-256: 78eee616d764f7f87442eaf624c706b3cb890197bc335400f09a362e8a1b34a9
font_01_sfnt_off0000ce3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3F 10784 bytes
SHA-256: 965a13d79cb847b7328034aa80173213248ee703bd3c5c99fae6fff004b8ff39
font_02_sfnt_off0000f32b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 19420 bytes
SHA-256: cbd7f3c6313300e835fa5215f27502a5d86f009c35840568299deb25628f47e8

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