Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f432e72c91a8fd7…

MALICIOUS

PDF

102.7 KB Created: 2021-06-25 20:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6bea8eea730aecc55ddd3e09ac73911d SHA-1: 838b2ec527685bd5463e005466ff491bc8b1d2da SHA-256: 2f432e72c91a8fd766f2e33c872eb383f3948eb6ce022d45e16ceddcea6d5255
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071456f0a397---31623372856.pdf In PDF document text
    • https://pharma-tools.eu/galeria/file/88988824368.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/30452778663.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/15429827465.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/46663591661.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/deb598160ef0d999a0344772b1db65ff/sedadal.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210620095201.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/85952612224.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/j485qh7akii2ajq4dhqm6pno53/sorumewesuzezomelevi.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abade2503b5---46345032724.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/42212237042.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/zawijuvozipotigen.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/rlmu9okrntsbn3fdivqchk0ma4/36279500817.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/buremimalanitenit.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/lopesufowemo.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee51ba917e---68185633874.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d2c4df930---kefomito.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb4c0241b39a914ccfc9ddfeb305798d/99893913095.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/l8ntfc7oj1qmfu0pqq1u35a1qj/sovudefiwibute.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/ba2c6bffc297fdce3cfb0e2f3b8277b4/51450606573.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/76420146212.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/kirevawejifalub.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/zijixalidimib.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160886585338aa---12587493582.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/lilozeruze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=honorable+short+formPDF 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_off00012e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14657 18596 bytes
SHA-256: 53a7d4c1a15b24a089073f3b561fa37460fc7e98ea95b3f9f5a34a613820caee
font_02_sfnt_off0001768f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1768F 10516 bytes
SHA-256: 327d253ff9519fbaafd67a33ddc3e4162703b026da7f0a3b2d7ffe0b8298b946