Malicious PDF — malware analysis report

Static analysis result for SHA-256 fffa330bf1148a86…

MALICIOUS

PDF

146.8 KB Created: 2021-07-03 16:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f0ec98ac5cb471cb29ba3196a945a370 SHA-1: 8e4d2e2e125fe0838223dfd4714551409dab97a8 SHA-256: fffa330bf1148a86f92b68ba9ec49282b649dc28fe511bb74d14305c332521e6
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS upload storage, suggesting a tactic to distribute fraudulent content. The document's structure and heuristic firings strongly indicate a lure for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/72f387053aee9f6f960b6564cacc6147/1069150156.pdf In PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/01659b8bad4325288c6755ce1898d365/pubidorekorupagoraxefur.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ad404aa40---neratufinobaregagow.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/fewololupi.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/d0087a4aa42d77772ef2835fc7739017/95138367478.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/wupejegupadikof.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/71749088946.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/ribupozadipav.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/33904185860d3b930f1b57.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16092c3fba771f---52481685.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/debafafotanowegixapax.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9827e03026---37240911584.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/nqubkgs0e9jn5j5elr7embhs7a/19191006156.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/pus6ms3l3h37d7gen7p6gqe4t3/25468310741.pdfIn PDF document text
    • http://eotp.info/sites/default/files/fck/file/gixobaguxilepipodonu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081a44774c7b---87440169517.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160791632d4d30---31395967471.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607413448389c---75353619846.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/16253131685.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/ec8e7f67d58c805a7ab5996c5878a328/numaxirunoropi.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/892050d88a79656247c3bddfbe1dc99d/vixitoxagixese.pdfIn PDF document text
    • http://ruegen-ferienhaus-schneider.de/userfiles/file/japagepebiwukoximuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=6+month+computer+diplomaPDF 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_off0001dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD41 10780 bytes
SHA-256: cbe0f81173b8c0c1b14a357b148c7bc93de85a3e43062930c7d23344c45ed36e
font_01_sfnt_off0001f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5C6 18144 bytes
SHA-256: 4c1ac9904d2bfc77ab0e96ec4ebb9ca3f4fcb0a3bc585b755bc308d8b71e2078
font_02_sfnt_off0002259c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2259C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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