Malicious PDF — malware analysis report

Static analysis result for SHA-256 05002216f330aff0…

MALICIOUS

PDF

78.7 KB Created: 2021-09-07 20:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5ce49a0d0263e1b08fe0c28e0632b7c SHA-1: 4bc7926c37c77ad9b257d8263aaf476bcea75dbc SHA-256: 05002216f330aff007f41ebd836f48d40f9a3098f72c99e4036b02d64b8ad2cb
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/cvsjpklh3fd47urv92dc8n5lcj/80915329992.pdf
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/95010663518.pdf
    • http://bakefruit.com/uploads/files/202108200254437516.pdf
    • http://erictex.com/ufiles/files/xutiligipovexofas.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1g6mikqqg3i3ad9ulgukpqv8v2/depukajumopegoboluniki.pdf
    • http://francescofesta.it/userfiles/files/38798913866.pdf
    • http://massarentearchitettura.com/userfiles/files/43544893073.pdf
    • http://immobiliareborghi.com/userfiles/files/kasoxujofarukojinafasan.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610b80b6390b5---tinikizenen.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/t0jj75t5fk70d2r9gminq4d61n/modexagopokumovaw.pdf
    • http://griswoldremgmt.com/uploads/files/jilisazokejulagareja.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2ecc9aeaa74821f776cbb816825b6846/bumuwaxizazaja.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610abeb40f90f---82391711185.pdf
    • http://classtool.info/upload/files/81822414002.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74300b0d79---15393635879.pdf
    • http://nationshield.ae/userfiles/files/25769129390.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/o9plqohofr7mdccinevs4sq4fi/78326129686.pdf
    • http://lt101shop.com/userfiles/files/30929102974.pdf
    • http://form4concrete.ru/pics/cont//file/zosiditakiniko.pdf
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/dufemawi.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f37daa3f9cab0d6b3792d16a875a1f31/kiwuxikiwub.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5a3b0f4b---78718732438.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/5d6c14105a54627c061a8d8b705b3d13/tovif.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/6934b200dd9ab42110dfc134dc6f5cee/30643918206.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=on+time+atomic+watch+manual
    • 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_off0000d256.bin
921378eba283f78c96899ec52141c76f3ef21ff49fbe7957c0adaa0cd292cd47
pdf-font-stream PDF embedded font (sfnt) at offset 0xD256 16844 bytes
font_01_sfnt_off0000fdcf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 16792 bytes
font_02_sfnt_off000115e6.bin
6c61b5117fe30654bbffe3299a277d7525d79913cb5cde2933a8415b21eaeeef
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 10436 bytes