Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2439b73f016a61…

MALICIOUS

PDF

98.8 KB Created: 2021-07-01 12:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 089c7f923deea9fe5dc655e6ae4ec2a9 SHA-1: 66f676cc3fe1a46adbac51fce1b53e02b3f4a8e8 SHA-256: 7e2439b73f016a61e4615bdf52fb3e722711da8cee6cbcc993032377a135f9d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://securityguardsupply.org/php/uploads/file/kejamagema.pdf
    • https://bd-sokolovska.eu/userfiles/file/45939254639.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd8a16ae4---tapavurobosoro.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607219224948d---17665730045.pdf
    • http://casaatlantida.com/userfiles/file///batoji.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160802fb8e2ab2---24097262837.pdf
    • http://adamlegal.com/userfiles/file/40973029382.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160874d6b846b4---7257310997.pdf
    • http://colescastle.com/clients/875019/File/vutijopewagiworaretek.pdf
    • http://beiwendq.com/userfiles/file/zitode.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb833eb108---vixotefovozuxeva.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef2f49f380---54907804714.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a46f9763db3c8cf9619e97d77dc50cfb/30619543597.pdf
    • https://nslogisticservice.com/userfiles/files/580584169.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/75109663b0134f1f31df5c205829f792/56925190172.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa835e38ab---1844204749.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160d9167f32a62---natav.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7c86d4155---29075507834.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c209a9e5c4b---sisereririlukaj.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39c6a9e69a---fisovekaw.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaa561f1ea---deruzopenatuzemajil.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2efb1c16223de61a647fb0477bcb4d76/59281353133.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/58b3059e40cd3d09c5cfe735ce0075cc/goxixolemu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=hello+in+china
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b6.bin
6db7184a1a0ab6d00f2851dadbb6fc7e8b0b225c7781a5c8a550cb369239936a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 9952 bytes
font_01_sfnt_off00010d83.bin
d8a35d5f04e69fe141074eda1d5762d5aaf78ba78255708860657278c7acd5e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D83 19912 bytes
font_02_sfnt_off00013de7.bin
ee9212d2655ba3644a4056416e3e1d0d97df7ee5e78d4d857e75a8366347fe06
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE7 12132 bytes
font_03_sfnt_off0001646c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1646C 16792 bytes