Malicious PDF — malware analysis report

Static analysis result for SHA-256 04633bd189be8519…

MALICIOUS

PDF

92.7 KB Created: 2021-07-23 03:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8d8c6b310a94aca24431962bb84e6384 SHA-1: 61c624c1bbe842ca9b3877260d9c03d3d2533b45 SHA-256: 04633bd189be85196ddf03b7941162ce0982030c451824e7a55071e51f65d7ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://carcable-bg.com/uploads/pictures/files/junonegilo.pdf In PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/2qkj7r6siv4h1oc6nuoa35qgmh/muterurariribon.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/fowosejomeriwenufekologum.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/10050590671.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/81098016959.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210601014626.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/98f035a4ea0fd017cdf9d2450429f942/medatejelolupeg.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/77f93806f659001743106f4a6f76eae9/sijixigebepoxadanajewi.pdfIn PDF document text
    • http://pauseforserenity.com/clients/1/10/1002a5d8b3740fc7390aa1937d1ec3ed/File/94661176242.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/scevc98kihfp5k49g9spg6d4so/27681952771.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/90567499480.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/mevenepifogubuwumasafab.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/35f6caa7bec05a978d0997f226e785c7/xuwadewisuresumefuxuw.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0298e8454---17729227044.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/pusitizakun.pdfIn PDF document text
    • http://ecologie-energie.com/userfiles/file/gejuvodofiverimuzuxoken.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/78736247946.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/0ndc5hgi1s4okdp0li0t61an94/wadojofibojabetede.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/fajituzavuwaketed.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a878f40bdd2---21586570884.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/ebcdc252f5842c86a7c381f2a7be0707/jiduwepufibipamosot.pdfIn PDF document text
    • http://rilta.net/userfiles/files/zaviwoxik.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/af0fe8d7c86e3aae7318efbd72c06e4f/80977071659.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/gisimufupa.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/terajix.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/jewipaxanezapus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+many+crowns+are+there+in+heavenPDF 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_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10704 bytes
SHA-256: d3aa51698941e018fa4b97456d715b1b4e539abd6169b1c25849afcc4ebbec4e
font_01_sfnt_off00011bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFC 17836 bytes
SHA-256: ed528d681420b32230bd20d8a29fb2a044311e2ad5a7bb5fb23c2c4939a27b0a
font_02_sfnt_off00014a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.