Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1ed7a6cf2fef7d…

MALICIOUS

PDF

88.9 KB Created: 2021-08-11 08:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 656bd17a5dce8feae2cc35d0f796fa92 SHA-1: 253afec8980691908a9269a311b64ff48cb890e0 SHA-256: fd1ed7a6cf2fef7d407a766354e32470b55a4ac6a39bc1a7807a336810e2dfb2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to potentially compromised websites hosting further malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or redirection to these malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://logo4you.dk/userfiles/file/xoliga.pdf In PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f66c75a412c2233a31587bf1111d961/47570719623.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8708ed3933f3e117fcb25db25ac5fd1c/91639771318.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160baf04107e71---woraberiv.pdfIn PDF document text
    • http://canadanur.com/resimler/files/16348030044.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/31121842000.pdfIn PDF document text
    • https://vientangluc.com/upload/files/63758570853.pdfIn PDF document text
    • https://go2germany.ru/files/file/wogowejovovinisebiboxerow.pdfIn PDF document text
    • http://alkanboya.com/files/file///jotebedawokubezavugepox.pdfIn PDF document text
    • https://perfecthospitals.com/ckfinder/userfiles/files/45822732316.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b810e2f1ca4---teparija.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609002ad0e001---kewilalarobibi.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072e0e301876---7203320328.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/vakurefikorobafini.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/vutiru.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/75stmidk3jh6i08b0bc3nbo58c/xududexiz.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/beguvamomejorikimil.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b79171375022016d8d5e101d779e1ef4/60513488830.pdfIn PDF document text
    • http://elitvorota.ru/f/file/49883663418.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160fca2acefc2d---27766234363.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608853102b54b---lisodi.pdfPDF link annotation
    • https://tavcam.com/upload/ckfinder/files/37649951007.pdfIn PDF document text
    • http://attlas.center/userfiles/file/62497179450.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/mowufazosotebopaf.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/3ceb042b0a845bb52fb4f0f71d7c72d7/89920581274.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/18276135716.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=hd+1080p+movies+free+download+bollywoodPDF 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_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 17580 bytes
SHA-256: cfa5828589b8b0ebe70a41f112cd982c407a543ca96e3c6431f10d68167c91c2
font_01_sfnt_off000123a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A7 11340 bytes
SHA-256: 1691d7d38481d8c80757f8a130e8dcfef8504391eaf7b480c0f83f835dd0cbec
font_02_sfnt_off00013e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1