Malicious PDF — malware analysis report

Static analysis result for SHA-256 052ca42e8995141c…

MALICIOUS

PDF

92.1 KB Created: 2021-07-03 01:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3c0a1c454bb11e0c53bf8729002f40c SHA-1: ccc93096a65f5aa70cfd41485fcdeb9fa42988d8 SHA-256: 052ca42e8995141c0ee5eaec46146448fc16b9ae4f3bb211d2ed70280ab90d14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to download or execute additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609489c34d94d---sunogovawefavigodiw.pdf
    • http://wanyuantemple.tw/userfiles/file/70485481976.pdf
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/5542414963.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/71c24188f69e4035a189d609647d40f4/98176897459.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/e86f9cdf95616cd416ee56bec9511073/99458032660.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/38dffdc946c5471e560e4a5c81333efa/desoxotenuxonubiletakeli.pdf
    • http://fobosgrunt.ru/files/ckfinder/files/84723737150.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c2e20aef9---1709996408.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/63075496323.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608170bba2732---wegagifaniveteporijen.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/d8841a8979a9c010ba295dfaf42e53c3/suzudavab.pdf
    • http://tafgambiatours.com/userfiles/file/33332386792.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/71449366418.pdf
    • http://macautemple.com/userfiles/file/11940720646.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6821a2e6---belegob.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/iem80q78ikv8hn69tvo89skbe0/3771124487.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607482ed2ed64---tutudomirubukolefereta.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b2e501e8b6ea706d5ea2fe6829c17141/91486824394.pdf
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/80025173277.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/e20djdidqvaakfvq2o7g3l41g2/70201840681.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609c248b49a26---35289373543.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/4uao8utnaejj5gac598a8lukc1/70077571445.pdf
    • https://alianzatours.com/imagenes/file/25196615600.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6daf08b71---4435515246.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=making+shortbread+biscuits
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 16792 bytes
font_01_sfnt_off000104c1.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 16312 bytes
font_02_sfnt_off00011acd.bin
7e960aaad6df0fbce94992f5a3bdbfa4b6c509549b98304b6da4fac454c7e2b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACD 10928 bytes
font_03_sfnt_off000133e3.bin
0011d6adfd3244b83c7400f761afccccfd0eb4e709b2484ee5999e6895c3c73a
pdf-font-stream PDF embedded font (sfnt) at offset 0x133E3 17660 bytes