Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd1e5c39e3c178c…

MALICIOUS

PDF

71.1 KB Created: 2021-10-09 13:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e1f0d2c2a92d69fc770402ea2629bf89 SHA-1: 3042c4c720823d4becfc6943fee7adffc7b1bbc0 SHA-256: abd1e5c39e3c178c8b2c6ea12a3f7faa8f3130bf0a78a75023ef3f49860e61fe
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, directing users to other PDF files hosted on compromised WordPress upload directories. These linked PDFs are likely part of a phishing or malware distribution chain, aiming to lure victims into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d145ef25d9---luvokag.pdf In PDF document text
    • https://gobelsprofil.com/upload/files/relaremideb.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/63435965651.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/pisetugamiduneresilano.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/tozakadepofawefogu.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/lasasiraxalis.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/7a151d1e8e08218e3b5e2c1008bfa664/talodejopinufozepu.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb573e3343---baketutapibaxalizineteki.pdfIn PDF document text
    • https://garnizone.com/userfiles/file/fevovibovu.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/tutopum.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132dc227b5b1---45584459067.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/kibenivir.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/93433680310.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/9695324256.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/74112770603.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021092315080397747.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/jinuwipixej.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/5226838664.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/88258759502.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/78280133674.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/48516918425.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/wimokulaxewisoxazobasaku.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed1ce5d1ef---77721110082.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/giboberekugoga.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613690e4b8d40---rorabewukagoxulowilap.pdfIn PDF document text
    • https://mandarinkinesiska.com/userfiles/file/pugizepofapolivariloxod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+myth+of+eros+and+psychePDF 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_off0000b543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB543 10824 bytes
SHA-256: ab787ea6663f2e6ec0ac3517b53edff3121222cb8c035eec181dd020d3b1f075
font_01_sfnt_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 16148 bytes
SHA-256: 7301a8f8c43943a895188e2286659a820862d7fb9d29673132216179a9c2069e
font_02_sfnt_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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