Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72fa1e2e7c178e4…

MALICIOUS

PDF

87.7 KB Created: 2021-08-05 17:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0f1995c9db27e88e464745daf15c8337 SHA-1: bd40c4a82572daecc58461588d6abbd54e15d1ee SHA-256: b72fa1e2e7c178e4a98a8ddaf60243714616cdf19ab06dd2473a4f64d64e1c4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to phishing or malware-hosting pages. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious nature by likely facilitating the redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 http://autoscuolepintozzi.it/userfiles/files/87160539258.pdf In PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/af06223909612a531489becc82ab97da/zemizitegidiseji.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c33a216608d---donozetogajux.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/96047347484.pdfIn PDF document text
    • http://hokeypokeychallenge.com/clients/7/77/77ac66e313b6cb4bf602f1678accca72/File/84665675041.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ee591074181---70799455959.pdfIn PDF document text
    • http://macphersonproperties.com/clients/876251/File/gepizidivofegiwinobuduvav.pdfIn PDF document text
    • http://bluefield1966.com/clients/26642/File/78023928413.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/83ec8333263f80c5ac23b446e112fa5c/fotadonupi.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/vejivupomudixopemi.pdfIn PDF document text
    • http://fastgood4cheap.com/clients/4890/File/54443605094.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/tawamajavutate.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/i3ia9rvqkpd957p5boc0bkmcu2/vajogejalufusep.pdfIn PDF document text
    • http://grandinspirations.com/clients/75274/File/zuwudimule.pdfIn PDF document text
    • https://plasy.com/uploads/file/82011696156.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gijj7flhthk6n4o0do9d2frpum/2491769027.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/a69e94458bb9b2ee0900d9cb9a92416a/79527667533.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/43352789713.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/dolutezanoxo.pdfIn PDF document text
    • http://kssi.ir/public/userfiles/file/59265922144.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/gamukowoxagotami.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f1ae80e0d---4189900444.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/f4f6sfrlhl86ht994qh2981dii/jidinavuperakezej.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210723192138.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/f037386ab9d22b584867c1e67da37a44/sisonuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=substitute+for+123moviesPDF link annotation
    • 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_off0000f51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2E 16452 bytes
SHA-256: 187d8e107988429cca79e9e1294664a62e891c7a5f928d7b1f65837b125cf68e
font_02_sfnt_off0001380f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380F 10788 bytes
SHA-256: 4d96eb204027665a75c1dba451cc791820c922aedc6864f0c45b54cb0514a12a

Open this report in the interactive analyzer, or submit your own file for analysis.