Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef03925e0253c91…

MALICIOUS

PDF

90.7 KB Created: 2021-06-30 01:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5ce59af1c1581e19705bd8fb1e07fc46 SHA-1: 2911502c545596b330b765b6a4176d8e792cfe05 SHA-256: 0ef03925e0253c918bdbc9c263df742f20be690512af558b734f2482ae73ac68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, forming a link farm. The presence of embedded URLs and the nature of the heuristics suggest this PDF is likely used as a lure to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856e2dcd185---91460735075.pdf In PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160968da217b03---rukuvepir.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/juwilek.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/c664f449966d7e8c38e8e1d46026837a/53550347655.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58618a6b1e---vixevilelofi.pdfIn PDF document text
    • http://veivel.com/userfiles/file/wumigitamagomerakivoxe.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/gafofimivanixugewudemej.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74462a71d7---zopazorosuxabofiluxatug.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160db982e0b2f4---zamujifefaratuzuzabow.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/58111737215.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/3049e1e5b14c10fb08e4244ef1da58f4/wafavojivujiwiduximabija.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/2597268923.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b3440ef8a---35461111341.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/dq0eogngobe8cah30g50mof2r4/44562002274.pdfIn PDF document text
    • http://asustainable.com/global/file/xupazifefovevexilil.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/dopebimegezetix.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb933f7a8fe9fc39bd7d4d8b0f6ff58c/muwisujawowigox.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/zedefizesigosimegu.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/83128412768.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d83da9f9ee---dutakomajezoled.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad19b58b2c---lugafisowe.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/3b30d1fc2575fb15d92da41700c0dd02/gabopuxugiratijumim.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/42626565757.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=bending+space+time+to+travelPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1F 10976 bytes
SHA-256: 529dc86ac20c53d3fc31dfdae99bf1293c775580b64054fabae2015de4ec19dc
font_01_sfnt_off00011868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 17416 bytes
SHA-256: 452936c19bdc81062717ae67f044b01792acecf2f7107eb1422713ba26251ed8
font_02_sfnt_off0001459f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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