Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd6885beee53353…

MALICIOUS

PDF

88.7 KB Created: 2021-08-17 21:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 86a8d654f81fd077d1da93e8a2961401 SHA-1: b2bc8342906457267cb0b5420c6e8f1a62f481c9 SHA-256: fdd6885beee53353188362d0739e017de1d44a968e8e18ccb8d6deca5352ef28
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and links to various websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.jindatunnel.com/up_files/file/49948536444.pdf In PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/47552867262.pdfPDF link annotation
    • https://digireg.sk/upload/36290666273.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/54793191941.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/vadibumubovuwaku.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/64bc6109a3ee11d8d2dee2b182a9678c/97393341314.pdfIn PDF document text
    • http://emachn.com//data/attachment/file/ferunukisatisonagiz.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/438f7be4d60be957af401ea6ffbc29cf/laradonoxebu.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/o0pbh6em47pdnl758ht9s1hhm1/wozavi.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e722246f1---71139413487.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d950bdc0a4---15289242219.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105160105.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/45776118489.pdfIn PDF document text
    • http://superplasticizer.cn/d/files/tusumagajata.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210706_052208.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/vetetoziwenabutelivu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9876efff---sifuralarowovikosi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4evvo1dgo10ih9hpos5hhpro36/50003173824.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095921bd28e7---31992903952.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/91612773167.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/4cf94fe48d40d2237a0e975560f988f0/xitubadi.pdfIn PDF document text
    • http://qca.ch/userfiles/file/lofovunimi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eedaa3797b---rasekibezejoruroxozefoke.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/tafobemamuwulatigugo.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/neguwugowapubemisekuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=glory+of+generals+pacific+mod+apk+unlimited+medalsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA9 1816 bytes
SHA-256: ac64a4388a5aca168fc934c96628db903b0a8e8ddbda1d286b0ae9f9866b00ef
font_02_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 17720 bytes
SHA-256: 96ee8cff5907ee0a2c172636a941e2f5561ae77eb1471dca1b62738bf42273dd
font_03_sfnt_off000136c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C8 11308 bytes
SHA-256: c34cf738ea6f89e017f82b77408e5b46a689d4257c6ce014130b2d2c9f50e35a

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