Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11e7b38f00a7467…

MALICIOUS

PDF

89.8 KB Created: 2021-09-01 00:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be5b0f2fb8fd143c4b1eb0fbe2644056 SHA-1: ad02c67422bdef6cb7346c2b2c62eece58669f3a SHA-256: d11e7b38f00a74677288371f135329a985e907c6d17797bb37042ca1c630124b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's used to redirect users to malicious sites. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19e354e8c---xupisokebaroruworenuputu.pdf In PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/94478832067.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2f0dc13f0---mikafisuxesewuroj.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/l8m95pj9ld8u2vf6nvpqtgaet3/57705979472.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/5858016598.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/tivuvabubaxeduxazajowi.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070dcf6d70d7---wijenegeketezogopenazifu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/020120355662.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/6543574060.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/vaweborugumozasikewani.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/69281726352.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e9dc73f96ba8593180d1efdf858af083/worepuxiwunadatomaratuf.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/27150875936.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rnefmss9c1khsql6s0qllk8h9q/53007900266.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/69634435333.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afc1bb1df3a---kazuligodomimafusi.pdfIn PDF document text
    • http://lucann.com/Upload/file/66133413807.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/pigisiziropikoguwozinase.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8461_20210623181147.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/37383002119.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/pakemupale.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160de5bfd92898---15489147428.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8ab9aaf6527ed6708d6d25bfd3a231e1/buxekipikegisitoleba.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/89316252842.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/94841528529.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=another+word+for+long+term+care+facilityPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5B 10936 bytes
SHA-256: 2ee114064ec5fd2cd1c30617f432d511f2afc7ad76ee11a915a4a5d291c20832
font_02_sfnt_off00012561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12561 18944 bytes
SHA-256: d26923b7304bcece2e2d56b1f3f5562f100a242e70bfe925d345e5d2caf1c045

Open this report in the interactive analyzer, or submit your own file for analysis.