Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17fbcc18812a3c2…

MALICIOUS

PDF

72.2 KB Created: 2021-09-17 22:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f600b7d053789facb652bbceec68309b SHA-1: 42c2a8a18f71b13e581fded68f10ba3d2790cf40 SHA-256: e17fbcc18812a3c2aada35e4d31b96aa7916d13efa98a186e128b2add38a466c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to credential harvesting or further payload delivery. The presence of embedded JavaScript (T1059.007) and external links (T1566.001) are key indicators of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://coretry.ru/uplcv?utm_term=snapchat+password+hack+online PDF link annotation
    • http://2222.netsociality.com/upload/files/41975819259.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/50232806400.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/38949682340.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/a57ae0de191f51697f57a910ab5d8f84/47971939138.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/fowimenirisoxazalip.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/jaxorasuguzelunej.pdfIn PDF document text
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/43310689124.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/18253728388.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feea2775b7---nowoguluwaf.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/c5c83b9bdab47f6d0bb16e21a76b5409/6155815983.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/19598504438.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210908105522.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/8491268696.pdfIn PDF document text
    • http://laboratoriologos.it/userfiles/files/3593906463.pdfIn PDF document text
    • https://seerupit.dk/assens/file/farelixofupuruleneg.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/75707399854.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/durojugodokusetawikiboko.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/70226760612.pdfIn PDF document text
    • https://dukupahit.com/contents/files/jakefe.pdfIn PDF document text
    • http://mybyblos.com/userfiles/file/bijudolep.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://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_off0000b9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C7 10864 bytes
SHA-256: ed79c16989584fe6f76fa5c631d209c1c73eae252698c683df248906cc3d2424
font_01_sfnt_off0000d2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEF 16328 bytes
SHA-256: 9039380b3cb3045c7d41086ee1d04573566e1d3292db2d9e62781995081f1129