Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd9a5fdfae2d0c4…

MALICIOUS

PDF

84.7 KB Created: 2021-03-23 15:07:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 495ed423551dcf43376e8f843aa7585e SHA-1: 0deea4e59d8b67c5bfc184701e43991e8712da9d SHA-256: 7cd9a5fdfae2d0c43057da22604b074fd957c04aa71eb85422f3434c99e44e16
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs are used to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=is+procreate+pocket+just+as+good+as+procreate PDF link annotation
    • http://pravagims.net/gogenobogavumatamita2jg4x.pdfIn PDF document text
    • http://cardioactiveitalia.site/82597487006mj71s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_60585ad466eae.pdfIn PDF document text
    • http://musofiron.ru/genejovojog9x8ot.pdfIn PDF document text
    • http://kernig.store/rabakoropanogolazhgshl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408881/normal_5ff16e641028e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374372/normal_5fcf07880e517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470524/normal_5fe5fada251e9.pdfIn PDF document text
    • http://zootime.store/teluzanajew7tbxp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lazolu/49647228624.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/kakoxurojevazuja.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_b1b3054956ed445c8d15c880d285e6a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/19039058546.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/jejifuzuto.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/mafia_city_building_guide.pdfIn PDF document text
    • https://748e62c5-a849-4dff-87e7-3b5f74cb3522.filesusr.com/ugd/0df896_c7c5bae835f34c4bb93976a24e016aff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bodajaku/fifosin.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/zelda_breath_of_the_wild_guide_shrines.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/55204598351.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_394b97d8ab5e4628ba399ae91d813074.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_7253a5433db6488ba8d1123188c7ee87.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
    • 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_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 5284 bytes
SHA-256: 8cc6216baaac5ee54c68fe0336aef554a6d0dc23116127d7d8800e66738a8435
font_01_sfnt_off00010857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 11372 bytes
SHA-256: f507210a166cc731adbf45e90183e44dc4940affb31e2cab9fd6b156633a5c6d
font_02_sfnt_off00012f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F64 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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