Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e114b25e437528…

MALICIOUS

PDF

158.8 KB Created: 2021-06-09 21:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 74acf50066fb7fb811bac2ba57659381 SHA-1: 20e6c65146192bca33c79807331269c6f9f96f56 SHA-256: 15e114b25e43752808b5eba7544ca43c95b9599eafe07836c7934c0c7a698c6b
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. It contains numerous external URIs and link farms pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded JavaScript, though obfuscated, indicates an attempt to execute malicious code, likely to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=iframe+src+pdf+base64 PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/u2ku7lqdacoo4skh8ro8pu2lt6/37691100458.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/211ecf41a50d4e758e2df80a61734f81/67683232772.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/dbb436fc88facffea9431da73bf4f4f0/zidirimufanejomod.pdfIn PDF document text
    • http://jngf.cn/files/file/92869874661.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/41d10naqupdar2u03aq9pgatej/mojufopasetavo.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/96588836131.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/56p097oll1en0em7622qk3fv5f/75633828775.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607801f7d82dd---87220933136.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ed422e67850c3501a16b3810536073c1/vegisat.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/86d3cd213bcccd26a12bea772d823846/44149426761.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/39970946354.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fb20a1dae---41008158278.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9v5r9v31urhujjsua9rff45gra/43346901469.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974a38fd5b---9541609068.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/30524787810.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/89890898869.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vezofutajuvekovuvo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af752aacb7a---65528050997.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1399f106ea7dea9e740085cc1b88e70b/52049980651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00024522.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x24522 17580 bytes
SHA-256: 12d0b3ef213c66885160e85bb4db0e7fd552de6d362fa2d22aba6d34ce87c9ec
font_00_sfnt_off00011ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED2 72252 bytes
SHA-256: c1d213c91346a04409f743006d96b836e1845797682a83d9f22c8cae48aa58b8
font_01_sfnt_off0001f9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9E0 5032 bytes
SHA-256: cac81db3139b218ddee3eb31a92a95fe29f79b192e3e059f805b4b919cf5a3e7
font_02_sfnt_off00020ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20AE9 18736 bytes
SHA-256: dde62ed772a92f9b3ebba5e73c7e6f1607116162c8d30e204685b455d77a7bc7
font_04_sfnt_off00025f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F0D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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