Malicious PDF — malware analysis report

Static analysis result for SHA-256 baaeef2cf103d3c3…

MALICIOUS

PDF

85.3 KB Created: 2021-06-27 21:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1acbe8918fb095b9dfd952fedabca393 SHA-1: ae0a722f85b9822eb6b4ffda3c49f93a307c59f6 SHA-256: baaeef2cf103d3c35a96186bc2ff8d488be5b3aaa9f2de2f5746b12b6eaabe52
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the presence of multiple links to potentially malicious content is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078c85b15a06---fujatotijefal.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afd17917df5---38169571316.pdf
    • https://angelsstaff.com/uploads/file/suzelitimesaxeras.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/810100f4e5bf8c1a1d4a41c29910c7a9/zavefukize.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609a019f6c742---pafeguvibigarujozusi.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/ddc0935b939938431702a7a117f1f1a0/tezalelok.pdf
    • http://sterenstein.ru/userfiles/file/rudipuxedojuvujexikuw.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607689f05e130---33485817175.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/du85beqvaioadq55mkk22qpv26/semegesirevub.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782a3ad04f7---kedib.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/a69efjq9adh8040oivq30vtn1i/3409862498.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5ca560de5c6abf7b08c6026b0651faa6/63605522480.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/3f47cb1991b89e9447c01f896e8b865f/mawolaxununabotanokovop.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83108eca4---pegato.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c42d3c08ad8---70460961578.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/1a0c687ef0a58b53b1d1b507b9070e1b/6858856863.pdf
    • https://hankilfood.com/upfile/files/36709644394.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed6268d221---zitozipolexewunekir.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/89ee146d7223c9d73ef157338cf83bae/tosevizixamujavulig.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c8720e8c40e---58179809110.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/aq13kq0ee43j315o2kg1ue3dt4/vaxizezolofowura.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/7cc9583500b3fe7e638ce8ffe6efd37c/32453633895.pdf
    • http://cdmatik.com/uploads/file/jekepudatisapexutabexid.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/78862084535.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5b982d5d---37434154088.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=strong+power+words
    • 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_off0000ebec.bin
32abaa8ab9aec4d27227dbdd0f05c2e34e0fc3212560e694b65e4b234019c7a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 10428 bytes
font_01_sfnt_off0001038a.bin
374a8963795f003dd561d10ac45004bb2834c5f5c74eda523eb03bf794cafd41
pdf-font-stream PDF embedded font (sfnt) at offset 0x1038A 16952 bytes
font_02_sfnt_off00012fce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCE 16792 bytes