Malicious PDF — malware analysis report

Static analysis result for SHA-256 207fc9d463f71b16…

MALICIOUS

PDF

74.3 KB Created: 2021-09-21 19:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4d0a49c61d6a65f598aae196e9b00354 SHA-1: 780e9d01ad3e49d6c94db594166bf2915043009e SHA-256: 207fc9d463f71b16e0fdcfdd52a3ac18cfee2b037cf1dc5b738b4679233afa24
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many pointing to suspicious domains, suggests a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/vowebevon.pdf In PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0f494766f---34461095389.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/kolofupisagazux.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/18800213530.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/15321246201.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/pevami.pdfIn PDF document text
    • https://parlagame.com/calisma2/files/uploads/60551486744.pdfIn PDF document text
    • https://barcelonamedicalcenter.com/files/galeria/files/93337754817.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/77297455081.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/13888677742.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f954868a78---88017582546.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/49868253859.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/kidomagewirozo.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/lumezugozokadama.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/17673878438.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/95912763036.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/mekarefaloromit.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/4056652090.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/61192364185.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/sukejife.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-05-22-46-16-92.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/70869514415.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/86721358904.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=really+good+adult+jokesPDF 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_off0000c002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD814 17060 bytes
SHA-256: 88ee9975c71446ad8dadc132380092def54778f78735f67d6b196ef4a1896413
font_02_sfnt_off000103fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FC 10608 bytes
SHA-256: 6b0861bfcc39e9036569a0246d0e9de250fb407f42533495aab5b2cfc2f48a4e

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