Malicious PDF — malware analysis report

Static analysis result for SHA-256 60716897ecaa6069…

MALICIOUS

PDF

88.0 KB Created: 2021-07-02 01:37:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 40fe46c75d1bc4041a62f74c4311e350 SHA-1: 86cbfb4300323c4428f48474534dce99be88da04 SHA-256: 60716897ecaa6069c0f52fbcee10afadce14344635d6d8890b9d8ddeb10f9b63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and flagged by an ML classifier, indicating malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure strongly suggest it's intended to lure users into clicking malicious links, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://bajcsidavidfoto.com/_user/file/merugo.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/3df207s8c7clvctka4kogjrj7f/milunofo.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/nerukupapa.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/31561e13355e58d7a8184074d1256ea7/riferuzefixepofofozu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920fd9d92d0---35037494869.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/6c4d0a1629727693c577ea7a6dcdc4dc/livadivamubilo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7543048b6f---90802449038.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/280432001656.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/pm5qd2roo6l3l0mvvfhhe3oqv6/12926501681.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852e36b1766---rodogodegivedi.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/44452866620.pdfIn PDF document text
    • http://yuha.be/_files/file/tigozawibetizod.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5189716590.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e0c3d0de3---mopidofamiwenetepifobi.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/79147400217.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076fd63425b4---54408444004.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/4r708c2in32mtk260kijom572f/50314109753.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/1h4mh9rde16l15gj209cg2qvmt/zejobatori.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/83199226672.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/29291099163.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/955043d57103ae653819ae1c91aa777e/99709640956.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2272e036---40408526595.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ac592e5064d9d8fb5330f90ac4c00d70/gusojalela.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/nekegew.pdfIn PDF document text
    • http://ridendo.cz/files/file/dusoz.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/32i9dpdocu16jf0cf7rkhe7as9/keteroliruxiko.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/35732992346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=american+book+company+answer+keyPDF 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_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 17956 bytes
SHA-256: dfbcdfd282ca56d34d9b1a83c3270a01eda29c2150e455f081f2a627b5862633
font_02_sfnt_off0001399d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399D 10804 bytes
SHA-256: cc89043a1883ae2b4a607dd44023939a4f6e682ebf0842cc600dc814cc17f2f4