Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2c1a7869210121…

MALICIOUS

PDF

89.1 KB Created: 2021-07-19 07:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 01700291195417233f58be8aba22a07e SHA-1: ad73914e97826e82a62b3edd08801a7f3bb171f3 SHA-256: 2e2c1a78692101215ac51d3c324273042a72fcd2be41d9b832e9756aeb6e2346
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of embedded URLs, many of which point to potentially compromised WordPress sites or directly to IP addresses, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, but the heuristics indicate a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://zzweien.com/d/files/madibi.pdf In PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/19626f0fc30f868762064028134aac01/sasasufuputumi.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/25123055205.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae1ea37595---62507261326.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/q7ev371qh0s4kgh9fmq6mv3i9g/kepofimubaxuxaxizukewima.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/bawubiwanojanazuf.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/qg3laofmjivobf1erapij1alrp/38487763111.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a275db02be5---1072782258.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb5ad4c071---23075205308.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/52441103778.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/gugunepetesupelatedire.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/d42808ddbe75af5b5b9b1d2325a75c26/78844586662.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/gs63smld707a5qbsvuemvg5ig1/vukijujogad.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f33083bb8e1---38976138295.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160707c337efff---todizadato.pdfIn PDF document text
    • https://budapestpainter.hu/ckfinder/userfiles/files/91808512472.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/sasolipaj.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e47r7v51b8s84khnd7au7bv98g/93720682861.pdfIn PDF document text
    • http://sepremprod.fr/www/images/mediamanager/29903419730.pdfIn PDF document text
    • http://xn--80aikni6a0b.xn--p1ai/images/file/pokalujanozofoluwena.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160f0336be39b5---80944299341.pdfPDF link annotation
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f447c0a7---dewamenugona.pdfIn PDF document text
    • http://compsult.net/userfiles/file/bolinamade.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/20480338824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=eve+ewing+ghosts+in+the+schoolyard+pdfPDF 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_off0000f997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF997 17064 bytes
SHA-256: e0546321fc692c9c4a5c7df1eacd46096d948218f27e8d2955c75fe4ef0e74da
font_01_sfnt_off00012656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12656 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6D 11148 bytes
SHA-256: 09f84309233732d5d057858e3f3cb23e227f930e1f3faddf377a0dd0543daffb

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