Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeddfc85f1bcf05f…

MALICIOUS

PDF

93.5 KB Created: 2021-09-04 22:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 652b9b9bdf4d44e2f0672255fa070364 SHA-1: 04363fca2679b2ee82cb447f2063c67d34b00478 SHA-256: eeddfc85f1bcf05f4767789157e122f7b5edde5ddcd76b3cec504a04334742c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ankamet.com/userfiles/file/2320082555.pdf In PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/19097641774.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/risifam.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48516636cc---kuzosi.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16099cfbfeb53b---zedununivizogowavuv.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/5c2c09f7fbc1c108e73fd971918aca83/89692879378.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/xuvunabulatigoloveb.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/zadoxopufenoxakarujeniwa.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/32443970781.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/wamokotekewazekij.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091f0dec235e---21950104900.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/0db5acf1f780502b0349f6c4ae67a03a/tavonupadu.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/322e9452eed520240767a7640d7054ef/kefivo.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/1dc28ef9bcdee77d26ff8184cae84ab4/90673433531.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/mironedaxa.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/kebuwulakazime.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/dipevulezobitavezajiva.pdfIn PDF document text
    • http://cymagun.com/userfiles/fozidamobokixivefo.pdfIn PDF document text
    • https://primer-spb.ru/files/files/83166383562.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/a01d29f7267546f8e555f23253fa0d5d/jonitumo.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/rudipegojewiwofe.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af63e72c55---98554664117.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/91673200810.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42f5e0454f---69870008017.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/siwumidoxelisapowaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+art+of+invisibility+kevin+mitnick+pdf+freePDF 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_off00010557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10557 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D6E 11260 bytes
SHA-256: a105ec874846fecdfb940dc9b6c98b262e2ea08611eeaee6dd2fdf2d76d6c7bf
font_02_sfnt_off00013780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13780 18444 bytes
SHA-256: 2c6ebabd48a7f9bdb889760e93e0c39dd428493eeb4d4d28cd0bf2d0127891c5