Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b45158697da9eb…

MALICIOUS

PDF

78.0 KB Created: 2021-06-26 22:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: bd02729a442337cd1a9ac0cc5b4a9da1 SHA-1: 63da5dc563d70ccf3079a7c267a46787aa077160 SHA-256: d6b45158697da9ebd7298e12b716adefa9f802e5e53b61ae541246cf5229b541
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://allytemp.ru/uplcv?utm_term=strides+in+a+mile PDF link annotation
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/e2abc7cadabbbc416364b7918c80436e/wovegas.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/vlkh7ad7584f1fj18omgq2a8n5/82285972778.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc6aeee37b3163f15a6a00963d2424b5/rowesakarifuwuxaw.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c9657f6f---30199377588.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/kelibipaseruti.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/461e5d5d689688880d55513b925fd6c8/fedokotagudovidudej.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a7b5e8c0b---sabezuxivasawuviguwo.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/ba64c0f965f1606eb84690603e2ed1ca/92196839232.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4009b470c---88080298365.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160920e6d9b37b---88277463202.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/jokasesoturali.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/a63d62fd021edc8c61d46ae342eb4fd4/vezatuvakifub.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/208c32aea1848ad0bec85aacee599f02/litikorebatogab.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/23512239552.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/43402412527.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/70879815039.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc212e85c9---julajezumizaxutot.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b67aaee5e48---29670370243.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/58833482129.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/lhtpa9hii7ioa7n115lgi7jv3h/jewuje.pdfIn PDF document text
    • https://chungcungoaigiao.net/uploads/files/2643525264.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/52045718181.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/29805753061.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/a6esp2u900itr3fhj2gd723gj6/99192168314.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/12/file/20210512_221813_127.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_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 16976 bytes
SHA-256: 62bdf40f7024b5da321badd38c40cc52e2fada20f20d28afd92bf5e12cb90f43
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11391 10364 bytes
SHA-256: 529ed6a50e0bb5733eb4334ba3d5e8ce3ddb2b98a065afb3e0553d4a8b7b0037

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