Malicious PDF — malware analysis report

Static analysis result for SHA-256 382a3640043691b4…

MALICIOUS

PDF

71.6 KB Created: 2021-07-03 06:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 366999d7a53e76567117da9731388f1f SHA-1: abc593476e0dde95f83fbba30d57d51688f3e1cd SHA-256: 382a3640043691b4dd4261fa9d8c949066224512b68078287b6297385af4f166
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malicious content delivery attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://queure.ru/uplcv?utm_term=big+brother+over+the+top+episodes
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c63f55e26447108e83e21dafa6f11195/79789700552.pdf
    • https://247hvac.ca/fabulous1/uploads/files/gefitokujalenojivo.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160783cb9185d7---zuselokikafuvopaxupiz.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1debab91f---1527361239.pdf
    • https://la-klamm.org/userfiles/file/63864140929.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/qpdsvgocs6iuabgl25saaq5rr6/9099241980.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/6129e6577a46bb7fd777952ca38b791b/90375222174.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a821ff2cbb99dfa78d979166c4188caa/wumakewovel.pdf
    • http://eschool365.in/js/admin/uploadfiles/file/jarelu.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a0816f4b---nitadogirinomojijosi.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/eaf939be4aca40c02ef6a7d8458ab3e2/35134020499.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/53103968c309f6013c967fd45a21e493/28520059475.pdf
    • http://anandamsanyal.com/userfiles/file/muzas.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b106be44da8---xupikakunexudovitaj.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/64876516090.pdf
    • http://symbioticlifetech.org/attfile/fckimg/file///20210524224451_493769128.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/ebef8b9d31f6c34b09b894e24840b47a/xolabovizoxubufadodapelad.pdf
    • http://medicapoland.pl/uploaded/file/73126477500.pdf
    • http://www.look4job.gr/images/_user_na/file/ninitufijus.pdf
    • https://guclupin.com/calisma2/files/uploads/womipetolakez.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091898d7df78---18184191319.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d5efb0dfb---kewotewalarexatukugetap.pdf
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/galezubadugevu.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a767a9825---57371440082.pdf
    • http://cngwalk.com/fckeditor/userfiles/image/jojodo.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/94b96219e0e1675451f7469ee6e804eb/sirizijabizirozolumovim.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6f4.bin
30adfb13566637516d3591dccdfedc7d1a6ae053f99242e9e7bcd3272071d493
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F4 15936 bytes
font_01_sfnt_off0000e050.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE050 16792 bytes
font_02_sfnt_off0000f867.bin
f0e61e58aa85751a34d44dd87ac604aab0870f7d9eb702b3dcd2b4e977e8cf56
pdf-font-stream PDF embedded font (sfnt) at offset 0xF867 10616 bytes