Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa987e20eaa486ae…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 05:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8ca076bf87bb4f65d7d7f40c3d17a795 SHA-1: aa48904b2a53369d4a9a76ae3b74dda906dc0cd9 SHA-256: fa987e20eaa486ae341996eea526b5157bf5a1a23dd58d912d34dcb4f176ca87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bankerz.in/qpic/files/30005722989.pdf In PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f5a0a1ed13bf39ba1f99e2d8e7218fa/38555801585.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/17965052826135b39aa8e23.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gokik.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/gexexezi.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/43381609183.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/70443165640.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613487256c731---poxekozax.pdfIn PDF document text
    • http://gdgom.com/upload/file/210906194833098856n0deatg8nxej.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/lokovino.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/72181777120.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/66861128955.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luvasivozezaze.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/furevizanodenaserozox.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202108311849067097.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ed422bf7c---58647176451.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/745pkibtiupv2s13o7ja69cpok/wiwigaforo.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/suxibu.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/xupebumes.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/60783930008.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/16933854369.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/laneruguwobutabexofavixav.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/fokojalulezuzifu.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/18207114251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=spark+3+student%27s+book+answersPDF 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_off0000d122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD122 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE939 10948 bytes
SHA-256: 3fa89b64c875b6fba5303a37e9974b4233da69c2fafa747afc4e4bc28b83dc83
font_02_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 20880 bytes
SHA-256: 35b3e0a6cf65f012132e4f7b15ccf2de7ba1a89d4c36bbffb99ab85580b3d2ef

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