Malicious PDF — malware analysis report

Static analysis result for SHA-256 970d3afdc1e7cc9f…

MALICIOUS

PDF

81.9 KB Created: 2021-09-22 10:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4ba7ed1fc0aa18abdfe898a99ddea7ee SHA-1: 74346a501ba148bc1d06895885bbcc8767b7fbd5 SHA-256: 970d3afdc1e7cc9f036e27cb12c1d2e0b854d5f862284f713f866dd523f699dd
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The presence of numerous unknown-reputation URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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 https://drafthe.ru/uplcv?utm_term=screenshot+moto+g8+power+lite PDF link annotation
    • http://kxqcgs.net/filespath/files/20210907080115.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/63708819089.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad88203971---zisonawepalovugo.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/96587778197.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/felenaderuwowo.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/ropavogopef.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/33953507040.pdfIn PDF document text
    • https://moolans.com/uploads/files/loxafomijajizebepupepox.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe88f6c71f---72229621992.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/sogutenemewetuviraliwu.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/9mdclup9i196vbi5dmavqhb9qv/fuvivavupepaniguxuwomagi.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/pigadofap.pdfIn PDF document text
    • https://gencatakan.com/upload/file/bovufuruzerasiwamaz.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318018d2d66---18050550163.pdfIn PDF document text
    • https://izyskately.ru/foto/ck/files/1708126355.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/3035209896.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/zudasodonolosire.pdfIn PDF document text
    • http://agedwedfjtj.pretty-match.com/upload/files/veboramejixedo.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/wofuvanasamoniden.pdfIn PDF document text
    • https://hantverkarenisandby.se/UserFiles/files/55984238815.pdfIn PDF document text
    • http://singhaniabrothersltd.com/ckeditor/ckfinder/userfiles/files/vijipivepovojimiguxotu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614090ede7a35---vumizabodoxukidubavobuge.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/86976920435.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/70497768964.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_off0000da43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25A 11028 bytes
SHA-256: 4c819f0d8088729072776fff26282bfd5b357f634d7a9045aaf8f61c4c29daff
font_02_sfnt_off00010bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCE 17848 bytes
SHA-256: 60fa57f0fd9db40c38a6769259345c0e837440b6228e6cc29c4f4b145b1607ed

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