Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a875beefd2f006…

MALICIOUS

PDF

91.5 KB Created: 2021-07-07 00:32:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0a0ca02595dd0e836f6bcc6deb07f619 SHA-1: c8c0573d9e5004b249ea87b2779a33ae039b744b SHA-256: 02a875beefd2f006313ca911e3afcebce4b720ea83fcc7c2b1d646f32cd5f072
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the links points towards a potential download or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://laborke.ru/uplcv?utm_term=fire+mage+leveling+talents+shadowlands PDF link annotation
    • https://canevastoilestjean.com/upload/editor/file/77815432725.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7c59885e3---geludupixikexuxirebasola.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/30898839692.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/411e4c6efcfdc97fa48ac274e35a925c/66086078235.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/gegumirexiwuw.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/c6af1e90eec00571d62d7e76aa3a3a49/93825242597.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vothe0ke59956879adf104bv74/zivapimimutivoteweruk.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b30c623f6---40146995535.pdfIn PDF document text
    • http://inse.us/uploads/images//files/porasozowonamowepimijun.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/88916998792.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85e0ba190---82046301151.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/11699401939.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/78062074878.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093ba8536ff3---16747927169.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac961ea78cf---motubawiloxob.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/f2fe4ef4916807debbc792ca290353eb/56858135216.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebc1e9978a---63639291648.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/f45f25c5fef38608a3edd7e37c639e8f/kidabamibipuzazulat.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7lvu84evb22pfqsc7m77psrktt/baxefagedobowotuber.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f72c2925dd---kenojetodi.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/fugozomesifujajawalevop.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_off00010272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10272 10824 bytes
SHA-256: 19605945030b1e5331b2de8538d2b015a2a4804a7d8ac7e583ce7dda1bc832bc
font_01_sfnt_off00011b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 17648 bytes
SHA-256: 3c4e13da224dd485ed887c4a9d2ee1aef8357f45441a193bf5d0d4c7e1265f92

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