Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8a9292869f53dbb…

MALICIOUS

PDF

103.9 KB Created: 2021-07-03 02:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 52f51dd295366bde937a2042c3f820c3 SHA-1: 74de4a20d6e93fae2fdd451ae1da51c050ec93fe SHA-256: b8a9292869f53dbb0b70ad5d04f00a24f214e5cee8b2ab13847bb1efd962940b
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://botosani.ro/img/uploads/file/jowita.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb3ba8349a---70975978185.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/6i90r0cd96h9kumcotpbooheid/fonusidorojuposij.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/81741438588.pdfIn PDF document text
    • https://telenovella-bg.com/files/wigexatanukagolaruririd.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/77222439743.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/3023367862.pdfIn PDF document text
    • https://landi-bg.com/images/file/64447329761.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/tinitexotibabo.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/6737b3224d1f2851a536c95e06f8414f/40157627545.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/0kflo5mft7h1c6s64nr7t7ab0n/78734264700.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/pozuwasizedutedukedipezij.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1622657821gomobitodom.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c980d9eb1a---teperajobo.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/betedem.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160920bf01ba32---42354362941.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/44c127878d6485f76242a925c7789031/mutet.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/cbcbf0c0449d120ea09c833857be98ae/welatosaguzisekikam.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/vonuxokogizinugefilonepe.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/97a192e95430cf9e48a69cf723469345/vapuzupotoraw.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/98ad6849e5de9e34adfa2d41692e4068/54274084239.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/59821051900.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2ed0e369f---wisuwikumuluzuwanuzid.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/mazofepovurur.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/3365500591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=student+pilot+certificate+costPDF 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_off0001338b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA2 10788 bytes
SHA-256: a1ab7ea7a74dfd8f964a78b11717ed95e59292b8d74051b006cb5ddc3eae2a82
font_02_sfnt_off00016492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16492 17380 bytes
SHA-256: 44fa4355bb3004c59ce46a578e5c4044bff02ff9d7ccae555846e58a66f41919

Open this report in the interactive analyzer, or submit your own file for analysis.