Malicious PDF — malware analysis report

Static analysis result for SHA-256 33701f596d05318f…

MALICIOUS

PDF

72.5 KB Created: 2021-09-01 01:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: b629d3286804a9aa589f82db4366ac33 SHA-1: 154bb9e54e388901a2c56f22abb685267fce4638 SHA-256: 33701f596d05318f2ebe9010adfcdffbb92f18376fc77a8c700ea9bef6eac03e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4964598e43---kojepozuridetaganaguzaz.pdf In PDF document text
    • http://adamslakeband.org/userfiles/file/44024216071.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ip34fme5a5odg841t41u90cr2o/66846593217.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc346dd65e---71688326231.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/84244497500.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/11537737460.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/29061863160.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bc137e373---belorilulatojurar.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/c696b8ed7378f0cef869acbb18d367ed/vosenepaxoluxosaxutikun.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae523a4ab2e---gajologogewozimili.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/52935584933.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8e861368---xizidudiwefodeva.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/dg0r4guu0gfmq1hctbr1pb0g7t/nalozatimogirepa.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c318d51742f---gajuzovudavifatu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8d38c3796---94692661206.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/8c9d25311ebbeb8dbbe1fb6f1b39c4e2/bevalagitaki.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b6171baa7960094f67ecd38f54d57180/56265690329.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160953cf977a7f---97791087821.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/zunoporigesunajiveboxas.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/37073895347.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/2953197446089b5e9e30f3.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/75683467059.pdfIn PDF document text
    • http://kaies.cn/upfiles/210705050044253804a293vj.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/6e8a28c0027c221498c177f9dc0f2d3d/wisagowilumujogale.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/fuduwap.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/wekikejewijimiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=zenui+dialer+%26+contactsPDF 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_off0000be00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE00 9916 bytes
SHA-256: 2ab1cab1c21cc5dc6fd3ecc4777c5ea25f64375465640f3c39bd905c313e6783
font_01_sfnt_off0000d3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 15924 bytes
SHA-256: 2370f20a036cd15ffa20a9c75105796b546814c6731b9b6e5469b633be3d06d1
font_02_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1