Malicious PDF — malware analysis report

Static analysis result for SHA-256 8925a0886b1cedc8…

MALICIOUS

PDF

71.2 KB Created: 2021-10-01 11:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c2963d30ca7c62fbad3b66b9a0db64ea SHA-1: ed956dc553c7cf439570b42977f706e86b2b3ff0 SHA-256: 8925a0886b1cedc8c3d5cda1ce9ff0469d36da92523c65c6ca61b4a7c6b1dc6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external sites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 https://pixomot.ru/uplcv?utm_term=edit+psd+in+android PDF link annotation
    • http://z-him.ru/userfiles/file/46082084928.pdfIn PDF document text
    • http://tottazo.com/userfiles/file/47377852009.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141da5bc6e35---jubin.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/vedajekod.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/53649729659.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161437b1232728---38768102985.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/18966347219.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614df6e4e7cae---70732234608.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614db1f4511a2---35259001868.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614405e77ff58---55232794486.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615637309de97---gopuwuxomuwukirudojuke.pdfIn PDF document text
    • http://importfoodfair.com/userfiles/image/2021/09/file/velowo.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109231619461263.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/folifaxitoted.pdfIn PDF document text
    • https://rotitelor.com/contents/files/kigokaguxinobinosopovugu.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/25999003642.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/64573201415.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1f5e3bae7fe0cb70c939a7a8c2fa07ba/90577138022.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/38895267735.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/903c1ba2640c31ad2b9ca70a6aca90ea/gowoluloxataje.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/detajusavaxepeli.pdfIn PDF document text
    • 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_off0000b275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB275 10192 bytes
SHA-256: c756c344cb744f597fe295530ebd03bdc9a8c208ac1006943082a5c577e4c985
font_01_sfnt_off0000c958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC958 17336 bytes
SHA-256: 861a426f8a7c4d660731c53a20f03740de231a516be2df6e3b208a076bde0efc
font_02_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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