Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5defdaf6356c24…

MALICIOUS

PDF

86.5 KB Created: 2021-09-12 07:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f839d365067ab2bf26b764b157c5a2a SHA-1: bed319a6f8df053bf51abf0a4421bcda1a5490ec SHA-256: ab5defdaf6356c2447d353e06e1aecc12338c3cf271663f8192b022395adeba8
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also includes numerous links to compromised websites, suggesting an attempt to redirect the user to malicious content or download further payloads. ClamAV and ML classifiers have identified this file as malicious, specifically a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://zpb-maciejewski.pl/upload/fck/file/7660746405.pdf In PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/28291401786.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/woveneluzikosixusew.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/kowazipomusulegotonovir.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/rodofevolabug.pdfIn PDF document text
    • http://cwesp.biz/upload/file/97169844184.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/giwiwenoxomivided.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/1cr3so4865vo5lbgot1jstpt3l/84050631862.pdfIn PDF document text
    • http://glassick.com/userfiles/file/97561694973.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6efa34d5c---kubejixonexulareneduv.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/29861155030.pdfIn PDF document text
    • http://qianxi.cn/filespath/files/20210905131849.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/e2bcc1350fa59fa8d2a03f917b3184dc/81755512702.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/nizizavubaxolumata.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a88ba9148aba449ef52ce1e90d5a3256/77675880318.pdfIn PDF document text
    • https://razredna-nastava.net/files/31479777034.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/68161642636.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/vuranejisefaxudowisolidot.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/sedalitagimenofidopujogi.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210901180712412.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/38074864734.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66794705628.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/gurarifamimilun.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/02/tebonil.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/30744970373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=can+you+screenshot+on+a+samsung+phonePDF 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_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 18364 bytes
SHA-256: f87dde63251d1822f96b03872e6ace72d231bccbe24bc4cf4211260fb2a3a659
font_01_sfnt_off00011a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001329f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329F 10928 bytes
SHA-256: 9b0de1ac6ea1b0f16cf8ba6854e89010a33989c132ffb33712c7107f7bbe759a

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