Malicious PDF — malware analysis report

Static analysis result for SHA-256 186f2c038afc6ec1…

MALICIOUS

PDF

86.0 KB Created: 2021-07-07 01:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b1d9333332a6ba4aa831be1764b6e806 SHA-1: 2482163f4a3c72a7c63c413e17de76f1f07e258e SHA-256: 186f2c038afc6ec147d8d139427536f198ad542310c9a707e3a05b2000487643
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=purple+people+eater+meaning PDF link annotation
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3e3b733ffde33c32c74dbf59691c572a/87405191338.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/zubemekugigerutitekipobop.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/19976e8f80d6940fd9d2ad9193cb00f0/sidolaxubafulalasezopox.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/phublejobd0vfpg7vo10sq0m67/94695645598.pdfIn PDF document text
    • https://parfumzone.ro/files/file/61715985535.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3eiovvug6kpkhohk1nduablqi0/zasotibimekolob.pdfIn PDF document text
    • http://smithmaloney.com/clients/3/32/32eae1a42220421eddab78da2f55685d/File/3480368308.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a489b847d3d---7407946497.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/pb8j2926iiku3auk345dg8n7ck/mivegome.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/xekakamedomiwapamajes.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/0ef020d2ad525c2cf0c45d203ae776d3/3422589164.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lodutedawajopodugowavid.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/dazanik.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942ba188384---27832154820.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/wirosivigiwonekadezan.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ougs6iaj1i8j6loqonr3n2d8l2/nesenevosenakevan.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/dibaxatuxalisuralibupux.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/16780217517.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d3e032b7f---tomeniromujutafogugafejo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4970f2b212---30635103685.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/60bmdu3eid43mge9mvffg46ifb/talikovatat.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/lezufaxozes.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/vaxodudetoxofitim.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b4da6dc6d33---16863077052.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a5aecf9b3---girolaladoko.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_off0000ee58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001066a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066A 16972 bytes
SHA-256: 77d7e557079ba7a9cfd8945ee2b709c391f39d35ee5c8a968a314094e7f8a1cb
font_02_sfnt_off000132af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AF 10528 bytes
SHA-256: fe0bb5139ddd3ec3d4d46f37b089dfe4dbe1810d73162107131462a899299d18