Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f0d2072947c2a6…

MALICIOUS

PDF

75.7 KB Created: 2021-09-22 15:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c3ea4a1ab90c248b5a6850ca43f1a1b SHA-1: 933bcca89fe39badedf4e81f349de63c7d149554 SHA-256: 80f0d2072947c2a6b0dc50c33f3a260ab5d2fa5768e97ee9efe2d8a8e67e24eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=marvel+contest+of+champions+android PDF link annotation
    • https://parkettworld.com/upload/files/jafuw.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/78617852303.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143bff39c386---16300758387.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/vusidumejogor.pdfIn PDF document text
    • http://qianshunqs.com/admin/upload/47078367147.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/xaxipo.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/54870804451.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77618865409.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/87393665643.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/92499146894.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b21d23f3fecadb5e4ad5afd53dfa9f11/jabajenuvirenuziralasuro.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/60006389888.pdfIn PDF document text
    • https://pellevah.com/upload/files/pisagisogijurobumoregawa.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/40949389621.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/kuzewuwadegufaxuligu.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/ganadawapimomuwa.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/bezobuvejelapunanobifozip.pdfIn PDF document text
    • http://imapbook.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/guwidudipegupuzit.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/60592963917.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/97452504896.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f182bb4cf---56997295643.pdfIn PDF document text
    • http://eternoohydro.com/d/files/49957893485.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/mixukiludut.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/15703585113.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_off0000c0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B6 10944 bytes
SHA-256: dfbe78b2072e7c875e49f10ded25e8535e06db5b5e6f71d4050b5f69fd639475
font_01_sfnt_off0000d9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 18004 bytes
SHA-256: 3f9a9879364441a3d1007c6e01b3f75406c5ae65fd95305426de7a9d01454b4c

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