Malicious PDF — malware analysis report

Static analysis result for SHA-256 97000ca589fc00ac…

MALICIOUS

PDF

89.7 KB Created: 2021-09-07 14:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 443d91b4f0f15d5b63a3b462a18eb2d4 SHA-1: f745fec7651feacdd6ce05ec9f4f1cb2622e1fa9 SHA-256: 97000ca589fc00ac5b645c984814837fb622a4f839dca9295981521012cb44a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=hallucinations+oliver+sacks+pdf PDF link annotation
    • http://win-sonic.com/kida2018/ck_imgs/files/29489178177.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/64767965971.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/45987809224.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f979344e1f8---jajekakezidunuxaguxajumo.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/futabokigetokuwizelim.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0af6269d46---kadozewob.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/23895224951.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4e8c109701954eb0413be0454efe5848/1900005875.pdfIn PDF document text
    • https://digicpictures.com/downloads/lebabasega.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/57380697956.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/93068962742.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/28078314604.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638cf058ae---sojuniror.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/tusunonobozikite.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/17693579772.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086a293254e2---82631137042.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaaeb31b719---poriturufaruvapikepo.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e68e9e3a09a---6550884048.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a366e6bc241---94708942755.pdfIn PDF document text
    • http://russia-ex.com/fedipexuvemadexexorisa.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/67717141284.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/22439395240.pdfIn PDF document text
    • http://efeotokiralama.com/Upload/file/vopiweduzumel.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/rexunupatiwagibupowi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 18828 bytes
SHA-256: 39bb27a3cee5c59bad04122ee49e8414fad9541ff0c2b65e3f019d57c945420c
font_01_sfnt_off000127d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D8 10860 bytes
SHA-256: 24206a97f6b5cd5fe0d6d156eee4543bdd847aaa8cb17bbbb9a98259c41ce939
font_02_sfnt_off0001410d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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