Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9befe5dda885d6…

MALICIOUS

PDF

79.4 KB Created: 2021-09-01 21:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d55e8c3db7fbb31138d3a1559eaaa8a1 SHA-1: 9f51dc61e563f0149c5984f33b90228fb3ae3537 SHA-256: 0b9befe5dda885d6b9fcbad5e672f4bb5d394a90e8d3bb2c92fb7e5c0e8da1e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures for phishing or to distribute further malware. No scripts were extracted, but the structure suggests a malicious document intended to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://n95america.com/wp-content/plugins/super-forms/uploads/php/files/592d2159676a5522278f50256e8451cd/lofutitivalunefurazi.pdf In PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/337kh06gd63ukq2vlbj2bpt1m6/93620111044.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c623ddea382---fegodipuvedugesa.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f286cf2dc---bibiko.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/51762342774.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/t7e9bjo0vn18hedceu7g1kmd87/bupezivaga.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095dfee98ebe---25823435782.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/dajavenire.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/96921131697.pdfIn PDF document text
    • http://millecolori.it/images/file/19479241659.pdfIn PDF document text
    • http://rcot.by/pics/files/dukudatomobevufavatu.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939f7c3b2a3---vozokolamozulejabe.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ffac3a7fc---mikunosadu.pdfIn PDF document text
    • https://arerp.kr/data/file///19651214978.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/k7a2i5t22hqjsecptm3ngslpdq/3798109159.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/88686250552.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/neregezawisatapeba.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608caca21c7ea---goravaz.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/53861704956.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/37809818671.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/20361213965.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/2076341590.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cease+and+deasePDF 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_off0000d3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C2 18404 bytes
SHA-256: 8997ba59e35110e8bec3fc4d4a5492464890403bd8f8d006199041d15edaca77
font_01_sfnt_off000103ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 9816 bytes
SHA-256: b09bbcddc3993d7227013b3dce9073b4ca11244b76ad015ec7aa0f2d6afd3859

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