Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb58eb8bf11bc2d4…

MALICIOUS

PDF

86.0 KB Created: 2021-07-10 04:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 317ccf81fe3ae08bb60931950e27f40f SHA-1: fdc1575d6679c354ebb370631ec31a89cd09215c SHA-256: fb58eb8bf11bc2d4b2199c64220ef276374407b696ae01c67227940f8eda1fed
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. It functions as a link farm, hosting numerous URLs that point to compromised WordPress sites, likely for phishing or malware distribution. The presence of embedded URLs and the structure of the PDF suggest it is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609514dcc868a---xepilolesakudijulivil.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16096a8695ad1a---badusakude.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a482925da1aee56bda93427c6fb5b702/manilugodasewejige.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/odkt2g315plh5csj5mh791lpmf/72048837946.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1e78aa1900c6b468831a38a74066a06e/depowiwuvoputigipupob.pdf
    • https://acronimocostanzo.com/userfiles/file/josopijolivefefipugudu.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073efe3d6387---1303555194.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef7fcdbba0---ximupewubevaxew.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160793e90b0d3b---86498127549.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fc76ba3f79451267c48c7380dc4305b8/nukanegozegomapobora.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3914d4f50a30306140610f1b5aa03be0/somagulafegivonaxaxuma.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0c08d874775ff6df34a686482962976f/mimopukelixurudut.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/c8g7ms21ddr6irbpeoi9augme3/zajenotufixaroraviwi.pdf
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/xatumafo.pdf
    • http://akcjonariusz.com/UserFiles/file/jimemakobexususejon.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/a7a3c61c7b766daa697d47bb872aa3fe/55409142728.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/5ae2905kr12gf6ad4ud1ujn12r/14827920318.pdf
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/3d4d1e4b422d4aa1bfd1f13600907fc7/wajirinidosabi.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3bad608a---24065563809.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ba0a33ccd5df183a9cc6e13dc92ba02a/vowefabokabigoferuwufi.pdf
    • https://bawwabatrizq.com/userfiles/file/zaneb.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a73d0cb22---rifejigepelidileseje.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/65c864427a9d6716014c120490791a58/96042842645.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/leginajewuzuvazoluzu.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f61ec9e0---33002246216.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a0d862258---80296269289.pdf
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/65707b7818d5d442221a4ee5aa104bb1/1958703431.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=black+snake+with+yellow+underbelly
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec6.bin
97cb003c4b4717c05c9032628f69086bd4ed4fd63dcfe07efbb629c82e8bd968
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC6 16584 bytes
font_01_sfnt_off0001196c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 16792 bytes
font_02_sfnt_off00013183.bin
5bf89e7e39dc1fc910541ef084f25b2d91e69b81a967f2a5b945c0eb2d84e3e0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13183 11052 bytes