Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e47f0b5c1d31b0…

MALICIOUS

PDF

86.4 KB Created: 2021-10-08 02:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 57052520dce837a7143db0806f40a4a7 SHA-1: 879ed18250120f2fa79ca45b5421a83289e7a4fc SHA-256: 97e47f0b5c1d31b031b1f06b1a221e379aa850e53049b6f7aa0f47374dbe04ad
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 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://chcial.ru/uplcv?utm_term=fordyce+laser+treatment+cost PDF link annotation
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/rmpqbee1kr79jj1tg53u5vh9p0/57630548017.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614338227a781---paxebotawonipabilaviwol.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/67857762714.pdfIn PDF document text
    • http://maksimetall.ru/files/dujox.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/21157886063.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/56007614951.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/kozawalezal.pdfIn PDF document text
    • https://isosklo.cz/uploads/62360182060.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/gagasufojelepudilamoku.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/tozakaxalarafifi.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/xipuri.pdfIn PDF document text
    • http://htygroup.com/upload/files/rutaxikax.pdfIn PDF document text
    • https://deverfgrossiercms.deindrukdemo.nl/upload/files/tijakagonesinonedesimevew.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/napajinuwo.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/kegakopuzotukive.pdfIn PDF document text
    • http://edu-soft.ru/site/htmlimages/file/20742785719.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7938768c1---valagewarowemi.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/memere.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/80862321614.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/sanafotup.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/vupadakirugarig.pdfIn PDF document text
    • https://phukienbep.net/media/files/zemelob.pdfIn PDF document text
    • https://virker-ikke.dk/files/gataxi.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/givoxa.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_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 18868 bytes
SHA-256: c5e97afc77cc69a92091d20a3e1aae290c1d29e575ba4ef53586d843db129909
font_01_sfnt_off00011ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA6 10528 bytes
SHA-256: 7b24a470b9f89e52af0b5c208d54de99b707258eb018b05ad3ded7a234bf94ad
font_02_sfnt_off000133ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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