Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee83b858d019f8b…

MALICIOUS

PDF

73.7 KB Created: 2021-07-05 16:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7c32ac8f489adaae14ac356a4cbeb7df SHA-1: 6ff4366bc74a89609b2b68c504cc7a263dff7fac SHA-256: 7ee83b858d019f8b2564ff998c4186ed849303b51b6e65757c0a6b054c1b870e
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The primary goal appears to be redirecting users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84ca5c070a---nugigunebebusa.pdf In PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/bexiruziguv.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/so5qhucapnmfjvttbv62v8gs01/sojibunilogususin.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/27535426797.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/81784778170.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/65037648577.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210615_045639.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/33065170586.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/44342787072.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/28631048502.pdfIn PDF document text
    • http://momsystem.ru/public/file/gevoguzunux.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/47127065294.pdfIn PDF document text
    • http://temple.mo/userfiles/file/livowiju.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d52c7dba0ba---mudoxomo.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/au049obva63e618ea5tckmeki8/25527000307.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bb281b2d371---dizasoxemiwonovelajasaw.pdfIn PDF document text
    • http://wych123.com/upload/files/jubexowolivuroludovoli.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210604123841548.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/bubifowosar.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/sobori.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/43039789994.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/79373b7aab4b9abb8fbb7efddd0efa7b/74245521511.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a13b4319d9d---xukopapozelikol.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/70k3o26lqve0qo0r9as7565hnk/fibamazepodutijataf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+insert+word+in+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

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_off0000c159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 10360 bytes
SHA-256: d239c0aa4d3cadfb56d6b64d956ea032fc433993aaa59d5e7e890c4ef2e2922b
font_01_sfnt_off0000d8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DE 15820 bytes
SHA-256: f77ce5bde0a9d42731255471ab8e48d7bcac26892804162721c5de58b7bd878a
font_02_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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