Malicious PDF — malware analysis report

Static analysis result for SHA-256 0150114a6879ec60…

MALICIOUS

PDF

69.4 KB Created: 2021-08-21 11:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2592746191534175633889726b5b3fb2 SHA-1: 90f6aaf63d237f89cc7b98a60a21717217fc4387 SHA-256: 0150114a6879ec60132cf1598eb5677ff02f64a84d1c301de45cd3268a9d6ed2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pistant.ru/uplcv?utm_term=cashflow+quadrant+book+free PDF link annotation
    • http://hodori247.com/uploads/files/32697226979.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/i3p4fhien6gguv2lfmq4nvrq52/5576611632.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/89361593230.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/8876240167.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/nevudovexoxujugejixuver.pdfIn PDF document text
    • http://kredoteka.ru/uploads/file/kiximezomavulutenapozox.pdfIn PDF document text
    • http://scriptonica.ru/files/files/96541530766.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/bizikazixolavepi.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/xoxirugaditusizu.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087989ce3871---10319003699.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609f56d76def5---4309366214.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/97509763073.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210714072438.pdfIn PDF document text
    • https://graveyards-fuj.ae/userfiles/files/rowuwigada.pdfIn PDF document text
    • http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/farezuzemebo.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/43g216nb6guudtqqi9lmmakq84/fokabitozivukeme.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/44356008039.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/zewenesamizamatexubuv.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/72541094702.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/67454964385.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/76335398547.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/80023240174.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_off0000af7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7B 10952 bytes
SHA-256: 583f20431e198ea21ad4d9cf4086abf5e967fe409598c8620558259e76854cb7
font_01_sfnt_off0000c8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 15404 bytes
SHA-256: 2f93b995f8a878f17824a3e55d46dea96c25ac64493312052d9c219205aa22a4
font_02_sfnt_off0000f009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF009 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1