Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00513d994a65973…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 22:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02ba0522d701a271d5115dede81bb96b SHA-1: 887dfd8771e0193aade236492bb43d8e3379118f SHA-256: c00513d994a659730d3b1941bbdfa73fcc121949b792c3a9e621606164034953
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or SEO manipulation scheme. The embedded URLs likely serve as lures to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/19f6b0b1b345e58e495e7ae9f17d00ea/rixasowufijexalonolekik.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160deced3b3ef9---wizepu.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/cc5ef93b2062938929dfa50ecb0bec98/fosavetazudomalowimutopaw.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b6de7616df30a5f79255412baee619fe/laxis.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3865fd028d---duvijikepigevevifudoro.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/49017795299.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/487f7caa0371371b04a9d6ba7d4bfabd/41358862656.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/90615155417.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/fumonibozajaratek.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/50551449149.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/wamuzenakudibawetuf.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/38eecd3ed4b5c09ee867951354de4cbf/26265646943.pdfIn PDF document text
    • http://rideco.hu/upload/file/toguj.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf81ebe0c---52488080282.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/lareniguxala.pdfIn PDF document text
    • https://gizaviation.com/uploads/files/32279481364.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/ae1f8413c9b7284e94b21523da7cb2e1/10621146244.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/47kf9gavjv90dpd2v4jiooeoq6/jiduxezujumobasodik.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/rubivizetorisoxezaxaz.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/16561255704.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/9b7161bea05f6268fd71eaa33237a80d/78218297858.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/sojekolizuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=sql+and+plsql+interview+questions+and+answersPDF 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_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 10860 bytes
SHA-256: 73b18042026804570fc1a36357131b86a4809fd8b348975cca53f6b4f9a0dfed
font_01_sfnt_off00010a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A54 17444 bytes
SHA-256: 3e1a8864a5315696b1a4105f0feda8ecba4eef21ed8baa6f9996705f8db534f8
font_02_sfnt_off00013844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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