Malicious PDF — malware analysis report

Static analysis result for SHA-256 5945192788b63318…

MALICIOUS

PDF

75.6 KB Created: 2021-07-01 00:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d16094149daa9777227fcab6c958dd27 SHA-1: efccf4a3c4587be42099de5e34d724f1044727f7 SHA-256: 5945192788b6331856365834829c91a4b6a1aea25922e9d49d8c4c3e610e48d2
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing or malware distribution scheme. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://iamtimeshare.com/userfiles/file/donesoxeripaxoj.pdf
    • https://al-farh-iq.com/upload/userfiles/file/jemorumufexixox.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/f13eb635353195e5164d2f203bff6f44/xoleribuza.pdf
    • https://narimasu-chintai.net/jcfiles/file/8244809047.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/9f19056aabbaf9392e129f23cec4409e/92616886804.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/65p65j8ripggfl24l6vpndbadv/32850266709.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad140dcee04.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7307b4a786e1df2cc462fb1df9fe82ce/9156778666.pdf
    • http://grandinhr.eu/images/user/file/bonufikap.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/76e880baa875a1d069c0ea3e71783369/85992207864.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/af498774b15898f5c438230e54cb6d54/66545197006.pdf
    • https://clickkedai.com/userfiles/file/bixuvaxekofew.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/riwab.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/bc14971682e85423a7e035bba11eed5e/45398814778.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0f807a70---67800001209.pdf
    • http://apricomm.com/userData/board/file/69900395750.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a908cfa5921---kidovaso.pdf
    • http://talk200.com/admin/admin/uploadfiles/file/komosebulijubesosikixafu.pdf
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/dalaxatelizumemomeba.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/suzukolumawubu.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d21dec890---xotesikuseralota.pdf
    • http://scales-center.com/shop/fck_file/file/wafuwusopoloxusexupidojo.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e34691f0d---jenal.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/lelilafezexapa.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d21283bd456d94887837301dcf5ed7fa/40856765831.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gladiolus+and+dogs
    • 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_off0000c768.bin
4a5d4fd0b80be2b6ee8e4e21b2768d83d2ad13e61ae8d91149de57440dbe38bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC768 16072 bytes
font_01_sfnt_off0000f0e6.bin
4a72502afda4570f6b6e669cb5252d93e8aeb8fc16da0ece9566bbf3d7b5b537
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 10232 bytes
font_02_sfnt_off000107b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 16792 bytes