Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6b211d15f5dba8…

MALICIOUS

PDF

118.4 KB Created: 2021-08-28 13:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a1321706398947b9ec6f61c46baa3aae SHA-1: 3049e6128d93b6bc5d965bf0bd72c2784a920553 SHA-256: 0e6b211d15f5dba8e4b22316749fe88b1f6a18197d4779894b5e5fda22d90297
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF 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 presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://chcial.ru/uplcv?utm_term=stanley+2a+battery+charger+bc209+manual PDF link annotation
    • https://cahayamimpi1.com/contents//files/finijevelobiribetipap.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d223ae6bc9c3b6237c0357e6c2c71f64/50344715961.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/15986582626.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/vajolawusibarojevekugo.pdfIn PDF document text
    • http://liyangah.com/Upload/file/potasifazevatu.pdfIn PDF document text
    • https://lecachet.fr/docs/files/29392802977.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d46431e4ce3---kezasusuluwiluwaledakojap.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/a3fmflgv3prv28svspisi8da6u/xebivaluge.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/puvopomojasekivat.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3ead238416647a468e973e2351956146/58903066528.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/1991309279.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd8e9e00ea---50798951714.pdfIn PDF document text
    • https://emmaushuis.org/pages/20727108721.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/vuvelomodi.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/zexosewuvisizamozadukolo.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/10515154545.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/2423586466.pdfIn PDF document text
    • http://cafemsoffice.com/userfiles/files/70934744641.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/27466943068.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e26a455a3824a7bf5e6959af2c419c76/63077293001.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5eb2c4b1e---66246985964.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/wefeduzu.pdfIn PDF document text
    • http://teraval.cz/res/file/57196444872.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161040a96bb570---36635330984.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_off00016473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C8A 11136 bytes
SHA-256: 62e7b6c42214c231178e99b3a5b433ae31eabdde2cd7e151137ebf97f2d1004e
font_02_sfnt_off0001967b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1967B 20096 bytes
SHA-256: 4f5113d4abb290041b8f8bfdb4b1411fe7c17cca532845e1b525e53ca2a4b32c

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