Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c356f94382d2806…

MALICIOUS

PDF

83.3 KB Created: 2021-09-06 16:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3cbedd303b3df4554b13226facd0323f SHA-1: fcfba96772850274e888bc0990965beb2f2174a3 SHA-256: 9c356f94382d2806e657a5320e4809f206ca3c7894bae987b5e87a4d49fb7069
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised WordPress installations and other domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffa13f15ca---78866309696.pdf In PDF document text
    • http://grasslandtj.com/upload/files/71346605810.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/daresinuzo.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/11222653849.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/74765467753.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/29998522182.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210723174404.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53d24e2a0---98069135454.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/tirapabixakagepituneme.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/7e8f56cfe7957f35162c6904959a4fae/55696646571.pdfIn PDF document text
    • https://tipresentoio.it/images/file/firozikufe.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4f64dc0ef966af2f29ed668e01909e1d/kasovafufozemaxuzepoki.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/55747736565.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/642kop021l89skav4tsnp1v4co/wusiroterisom.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/29761735732.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/46740140346.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfaf3985ce---dawitejozubugomilewobu.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/82131988865.pdfIn PDF document text
    • http://potlista.com/file/files/35770173747.pdfIn PDF document text
    • https://badrivishal.com/media/xafobiladutigo.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/765e290f39b4f8a9d9ab3db3414be7a3/17274216533.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a94476bcc0---vakakuberapojujifipodal.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c0e5c989---zotupowesusomazewuvagefaz.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/7130038090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=aurora+r9+manualPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/44203547717.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_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 10028 bytes
SHA-256: 8c9b4526a4bda451aa08f745726fb3000cdce247bf2ec7f28416078679ed4ec1
font_02_sfnt_off0001143e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143E 16768 bytes
SHA-256: d50e942e593e395f448d900b34b4f3dfabe194a4237359d05986923f632816fa

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