Malicious PDF — malware analysis report

Static analysis result for SHA-256 0008930449fdea16…

MALICIOUS

PDF

89.4 KB Created: 2021-07-07 13:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 053ab6e02cb3a6213e719422ff589cfe SHA-1: b29cc008eb2cf2fd217d43abcd542ab2eb3caa57 SHA-256: 0008930449fdea160b85dcf4b839e46b4cc1b4ff15d016cc9a856c2a528f75e7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://caratow.eu/userfiles/file/tibimevugoderijuxuk.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57fa49a765---vetiwilibitexe.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c278010e90e---wujov.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0419338001625397789.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609a17d47a93a---lokiloge.pdfPDF link annotation
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5732173330---jejulafanome.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/wikemoxuz.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8b58ce437---rewulajafevif.pdfIn PDF document text
    • http://citra.cl/userfiles/file/37767104051.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160d07ee062749---roketatofutipumaz.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/werimufipubuxijasero.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a399c3a9c---merufukefufubito.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/7e085b6813616a2be7bfb88bd01f2334/bedipuz.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160903227d7837---lujotenoxivowokaxureneji.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/7c2eeb64632fda03b305029899d412d2/51755348701.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/rl2hv51spoa02rgq3o16m1i2ji/zepijumimur.pdfIn PDF document text
    • http://askort.pl/Upload/file/muporuwuwofefoxur.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/aro39p409ar1m2fk06dn2i2llv/tisiraseparijakele.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3b4e277dc18f8ab3a4ade7592e753657/tezexapivitagotovisumes.pdfIn PDF document text
    • https://purefeeling8.com/data/file/towesuxiripe.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/suroburarebupukatomupano.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/fa810863d2234f4fa947d90a6d90e430/2463233542.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc29a55d68---fevuwikapowa.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/fea42a4963b095745743114b7bd86d4b/nawipilubapidujeda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=definition+of+simile+for+kidsPDF 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_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 17444 bytes
SHA-256: 696edbef30e27ec9c4dd72470479a825ae02a73581b9d0427af9c349e7c91463
font_01_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 10444 bytes
SHA-256: 9102603dc46d6ad1cf6409417bf357d7743efcd700f32d7f5866af264cda0b1e
font_02_sfnt_off00014084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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