Malicious PDF — malware analysis report

Static analysis result for SHA-256 7269364c22b37b9a…

MALICIOUS

PDF

99.5 KB Created: 2021-09-17 22:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4fa9d63fb15c39cad18c9d75711df28f SHA-1: 08c1f868b744b00f60cd5078e61bfa6ee100916f SHA-256: 7269364c22b37b9af750b7f917f756167a4e1219c9a540d75fb014db66d0f479
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, many hosted on disposable or compromised domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing unwanted software. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://pixomot.ru/uplcv?utm_term=clip+keyboard+apk PDF link annotation
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/56324849110.pdfIn PDF document text
    • http://kondicionery-pushkino.ru/upload_picture/file/971487289.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/61776402698.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/bekogetujulaxelan.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/67965826806.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/12651070009.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/kebaduxadapagowisatiluseg.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/jemuviziti.pdfIn PDF document text
    • http://xn--80aamwn.xn--p1ai/userfiles/file/56677420958.pdfIn PDF document text
    • http://telecycling.org/files/file/vevegexeva.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/kemapasasenavanunovep.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/lirupikowigal.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b5099daa0a---86307471407.pdfIn PDF document text
    • https://cosonnguyenthanh.vn/webroot/userfiles/files/migisamemelelomifej.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/58251951508.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc68d638de---waxamadoloximezojisugow.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/pofuwotiluwomakalinisuwup.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/mudotunowel.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/nowikesazebebanagi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134e869c7eb6---30189396258.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/bosowojat.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/ligalureza.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_off00012024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12024 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001383b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383B 10392 bytes
SHA-256: f3a54537b0c8b8731539c6fff2705709b53c3bdb46ba2d2c0875bf1272483ec0
font_02_sfnt_off00014f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F9C 18828 bytes
SHA-256: 8ef74f6105e6091b4bb4447f84587a371210f1242edebef3bf69564ffc49cf1b