Malicious PDF — malware analysis report

Static analysis result for SHA-256 97833d088bc96fc0…

MALICIOUS

PDF

92.7 KB Created: 2020-11-19 23:25:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e6fcf03e88a78ca4415d0e271f98ba02 SHA-1: 903bc5a29f5ca5d3846cea1a68a27485ff2977c5 SHA-256: 97833d088bc96fc05926157396a8c82c62ea650af72d4b25ef7b5e1729af616d
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/strik?utm_term=one+night+ultimate+werewolf+cards+pd In PDF document text
    • https://madaleva.weebly.com/uploads/1/3/4/7/134772198/wibujofod.pdfIn PDF document text
    • https://genovaxoduw.weebly.com/uploads/1/3/4/3/134388418/6249077.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://uploads.strikinglycdn.com/files/a2f83236-2f61-40d3-aada-df4f893496de/97468206043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ee063b-57d2-4a5c-8c2e-376de863382a/abecedario_en_letra_cursiva_mayuscula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf6ca17b-df0b-47bc-9c6e-e9d6c1e72ffe/lomutekisadurifenokub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f18ca7-2f2c-43fc-9a7b-8351ddf9dcca/katasabajogom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62c0053-f155-46ea-bc5d-2222925a05fc/57687321539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a356a6a8-25ae-48cb-bbca-2164a3aea2e5/34546389686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acd72f2-f749-4b14-a475-f43185039656/rowdy_baby_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a859924d-da63-4aab-9c68-93778014392e/fopezikisinogibero.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/66693109918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f846603-b9c9-4031-8271-ae3d04689929/73491735552.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/12059262170.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00C 13560 bytes
SHA-256: 819c04d3fcae4347b215b0e5421c5af68d7be4f300c8bea0645b2bb77cc7bd18
font_01_sfnt_off0000fc99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC99 5568 bytes
SHA-256: 0d274dc1246b3f3caa8e301bf6e906c388fdef4434c6c0ec879b17f1c1e33e53
font_02_sfnt_off00010f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6F 16328 bytes
SHA-256: 0bdcf45cc1e3946b86a8f9e3aa6b3a9f3760b4316941fae1d05659b3daf9e964
font_03_sfnt_off00013f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F57 16416 bytes
SHA-256: b1a7be413c16529a3efb36790fb1ede9dbc47b99b1dcf399fe3ce16d881d47c9
font_04_sfnt_off00015549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15549 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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