Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17b0120f216e518…

MALICIOUS

PDF

93.4 KB Created: 2021-07-08 06:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 865953b5dc5b225cf9d4998c9ff9fab6 SHA-1: 1e2c6fbd8fbbfb6d09828b1c9984168bf1305ede SHA-256: e17b0120f216e5189b216eab6188a8479a46ac0f7367c50bbee65f048293412a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://smidgel.ru/uplcv?utm_term=how+to+clean+your+bunny%27s+feet
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/siguseletojulaveloxibize.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/78brfqdmuna593p8815ian9ub0/87727394869.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/hgrcegbplachtkfa58hal3kq1u/posixebedigexitevu.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/i3v3v1593a0i86va8c7cg5fqt0/84029835896.pdf
    • http://www.asslar.de/downloads/vefotexufewikimako.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095763e469ec---tigojubifimikuzeru.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7e8012b62595bbe41eaa4cd0ee1e11c/womukudemuzumovutu.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc81cb93d4---gupafeje.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8dfbe2c81---10089593740.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff46ac5316---valis.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/3aebfc249a611c58130dd5363b6f246b/pemikepefekekiwezo.pdf
    • http://predit.ru/admin/ckfinder/userfiles/files/pilas.pdf
    • http://sillajen.com/fckeditor/_upload/file/25899825611.pdf
    • http://jirehenl.com/userfiles/file/060327446812.pdf
    • https://aarhuskortet.dk/images/file/65218668233.pdf
    • http://nusratali.com/userfiles/files/jexajerononomexalabamib.pdf
    • http://ahcxdq.com/uploads/file/022119054556.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/62007e2a1ee8903e35153abb4b2d10aa/86717763370.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/367d7c90ac45199f226ea10ed5906b62/92336675514.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c0b416db5---71902742984.pdf
    • https://ibliberia.com/ckfinder/userfiles/files/gebavokam.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d785a691623---23233006211.pdf
    • https://zebcom.in/userfiles/file/6671231099.pdf
    • https://habrit.tw/ckfinder/userfiles/files/18952444700.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/18432696526.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_off00010a7a.bin
e1544bd195b16b867669d27920cc43a804d883d3568746379fe20b7c4ebf05f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 17344 bytes
font_01_sfnt_off00013728.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13728 16792 bytes
font_02_sfnt_off00014f3f.bin
4d96250a5bb7222f790fcc7fa1048c26bea3af5c4edb45cab0e81bcc0afd9cf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3F 10704 bytes