Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ecdc12f6d422c66…

MALICIOUS

PDF

99.7 KB Created: 2021-07-06 11:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2ba9c98ca269ed3563da5ed15c573218 SHA-1: 42832eeef2c1f753608047bf7d6db4cb10c7814c SHA-256: 1ecdc12f6d422c6613d18a38a1242fd4566826350a8be6ab117307cbfe995550
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malware delivery or redirection schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/a7db4327ada09ddd7569e048b41e6e9e/dilajedazodujakufusazu.pdf In PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2cd09f11---64976646920.pdfIn PDF document text
    • http://chineseclothingonline.net/File/bunuvogunezokomisunudamez.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/3698422132.pdfIn PDF document text
    • http://zatexpress.com//upload/userfiles/files/bakuzexuvowuluzupi.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88b77f062a---fimoforivonazoxoguwo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076125d242f5---galosewuwizefaduzel.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/25e3a933773bfc93277c91b238269ff5/24098789169.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160dc9a168d300---baruvemobisuxetoxab.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/65e1e06cb8d84a3aae7b6d7ee06d2f46/lavelat.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/os3i0rio0cht8c53caadhegb51/zevigesenakurufisamor.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/72960422d0c013c5db9f7a2529385317/kinokizoxepimema.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fau18md0q0jpdpnspbsm3s0hsi/78238504313.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021062515040977.pdfIn PDF document text
    • http://epsilonsigorta.com/files/26594490897.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/mu0k20td47dp3k24hdse54va1f/loxaposopofuxiz.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/29369813309.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/d309c570f61580630dbd50ef1beaccc7/vakukibumizipuforelata.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=writing+open+ended+questionsPDF 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_off0001241b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241B 10596 bytes
SHA-256: 5ec638558487277208abe3ad66a4fe1d43cd541ca7fa85d0b5f4ad46c04ed2c1
font_01_sfnt_off00013be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE8 17048 bytes
SHA-256: 8537fee928f47aa84e150fa8e46db492050605eb1008c6ced943e67eac9c19f1
font_02_sfnt_off00016841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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