Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62eb86952ebf94…

MALICIOUS

PDF

104.2 KB Created: 2021-07-29 22:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d37ca8004f160b63cb67d85e8d9c4f7e SHA-1: 709fd1b26ff093db75f0d591a0e57aa4a417161b SHA-256: fe62eb86952ebf94d99f14285caa162205f8f594c944a910e9b05bddfa50b032
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a 'link farm' heuristic suggests the document's primary purpose is to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://garglob.ru/uplcv?utm_term=hack+rom+pokemon+fire+red+pt+br PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a446c6ebff0---kapuxuwojilexuxi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/kq9u94p70hj3pte9lrg1ge5aeg/barulowase.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd850c86ad---67712134539.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/40641937486.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088c506f3e53---rupesufisewugi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a65ac3030befb0b2f4f21f89bd65e7cf/zumobizoxebekotuzofezuwal.pdfIn PDF document text
    • http://fittbikese.hu/files/file/lavanokepidajoredola.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072032a9e30d---63009352949.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cac7e68bc---gojiso.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b698d613537---mobipeguke.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/93744545913.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/12dl5dupb11u00qvlkq5eejdh9/letabusugisavubelikoru.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/qnbeu7gq4mfnpuqs1nt7n7io00/purizegoruzel.pdfIn PDF document text
    • https://mfdesign.hu/files/file/40352421421.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac4c69d683---13934431140.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/vugekes.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/ec839cfc6d362c7043d62a978a38745b/25342631069.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sofafan.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608476981901d---delavezukonoxil.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdaba6214b7---giwatodosekogozoxarubop.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1d8f477b2---xiwipileponixaluwipus.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/1vcuhmq3pt93cposqpe4914m28/37519773449.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/40216015596.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/lbo0j9ekacmripaohk3gd62691/54403955039.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/97782a4c68aaa98731414b0bd9f3f66c/79565769451.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_off00012f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9C 19628 bytes
SHA-256: 228b7700d4f546a6b89be6fe7a5dcab40f6524e3f5aea885d60a73adb90dee57
font_01_sfnt_off00016048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16048 10788 bytes
SHA-256: 8b64c9eef9a41375bc5be7ad5c3f1eafbef492a1342c60cb93433037a83b7a91
font_02_sfnt_off000178e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1