Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd654c093decb0d…

MALICIOUS

PDF

88.2 KB Created: 2021-09-06 01:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c16ecaa87139f56e17e5b38dcb781f71 SHA-1: 0d04419386a155199a0db064177bbc24415198a9 SHA-256: afd654c093decb0d3469e0d4e073b1e5ac101e9ede0892c306f175f6e5ed2d07
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://securitydm.net/slicice/file/22587066129.pdf In PDF document text
    • https://clubsecurite.fr/webroot/upload/files/87468629823.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160911a991d91f---togatopukofo.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/40363708804.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609541a5142d8---52732694379.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/vagopixi.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/2a6127f7e94a1583322e2fab0914d107/45183691911.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d9fc9be8---futexavos.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/muraropiwen.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/pujelewosivilefigumo.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/ce3ff69c63617683ff5f4a3b6a689917/69437437689.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d39f2daae---rovijuvovofobusanakel.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/051dafec2df69391fe19e92d112e5172/70376706355.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/8d92f9.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/5824794615.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/45154555281.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a94fa11a4b0---mupiwoxifizada.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/fojifamowoxujepugen.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/lj6osunrai9t46nadgrbr0mhhf/38667497382.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/35557179038.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/dodexajedivuwimu.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021081104504959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=warsaw+attractions+map+pdfPDF 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_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 10684 bytes
SHA-256: c7a8d63bc8e69f982e8b33bb903dc30259164b5120f50740871ba27ae4ec82f7
font_01_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 19300 bytes
SHA-256: 34580d14aa54c12bb8a0815129c27485685e4c289078c274b9fb6c419b97bbbd
font_02_sfnt_off00013b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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