Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5490ea03530997a…

MALICIOUS

PDF

74.8 KB Created: 2021-09-28 15:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ce7253ffebc7e10f3acac934d77eda17 SHA-1: a20b28048d122a9c5abed81c7ee2d162f03a245d SHA-256: e5490ea03530997a9ce61b00556a7a8115e7145f2ec65f9afd12aed01d20a851
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs, while some are marked benign, are part of a larger pattern of hosting links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a09b13e1a9---dawomofaj.pdf In PDF document text
    • http://ninda.vn/userfiles/files/22694755018.pdfIn PDF document text
    • http://irinabailey.com/upload/files/66196354985.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5d3e3d0b0---17120335879.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/wuxazodobedenozinokunuzaz.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33636005094.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/idlr9ol0rkipukrtcf4o0q5ecc/leweribajer.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/36896914823.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc2f132fa7---nodosavazoxupe.pdfIn PDF document text
    • http://www.romanschatztruhe.de/img/files/zevotezuke.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/sikesi.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/93491346571.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/dedibaxagibezejuxe.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/071e2b9ed4913dc16424f6187a6d7cc4/zonipijixanemas.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/70546996874.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///77950250606.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/xomizilifawupatemuxuvu.pdfIn PDF document text
    • https://mediaskills.rs/files/gekuru.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/7439552646134c29df3231.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/7892344701.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/53802431879.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/68697257921.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/32955791281.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/nowedawapusomaro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=damon+ps2+gratisPDF 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_off0000bc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC68 10540 bytes
SHA-256: 46fbddc485f564300fb3072bc42bbde8b78bb5c0718bda9d99bc87f13f172b39
font_01_sfnt_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 19288 bytes
SHA-256: afdb971514fee1eb8175a7a9b5c5a20ffb475ea9022a060a79ef90c7a6fd2a9a
font_02_sfnt_off000105ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1