Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f96de631312fd29…

MALICIOUS

PDF

105.0 KB Created: 2021-09-06 12:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 32fac056b93341a529b9774a4d25249e SHA-1: 47350e32d5e6be278bf3ad8e629e4467b06994d2 SHA-256: 6f96de631312fd29b873e7945234bfed1f838bdb9329bd16f07d924e4eccdbcb
156 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to obscure malicious destinations. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this is a phishing or malware distribution lure. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804c83c7330---35954593533.pdf In PDF document text
    • http://licausi.it/userfiles/files/rofuxopemubiromifafulema.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/87146747632.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/91908918830.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/mogusele.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adebcaa5ca6---4012093035.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/20725629771.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210901135946.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aa78d62dd---dogota.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/zedet.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/742c464daf810e6563ce59e14ea77ea5/kegalatufo.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/1987717870.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/11dcr92qvdt5aikbs1bb3fobuv/70334877572.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/342ma3vd1clh90cm7erb84ge15/kadexem.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086bd5595d38---nomile.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/geremijelijujikubefode.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/70c8aa57f55ba912faa499f52274647a/28053292775.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/43423869658.pdfIn PDF document text
    • https://ms02bet.com/contents/files/gakitatavipuwa.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160946d248a107---43385205405.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbd288f648---rupowur.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/jikoxoporetafititimaj.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/7980677162.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/bd639dc084e88ff142ffb1e51f5ee8f2/botezi.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/nukegalosejirate.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072aadf9c94c---rujagakewixagifavedol.pdfIn PDF document text
    • https://edarky.net/data/file/30940065830.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=communication+skills+course+outline+pdfPDF 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_off0001327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014a91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A91 11004 bytes
SHA-256: b6a1624b9a417ac8f584705b6791d3b0b8841126d56ac26aa85cfe5d034317c2
font_02_sfnt_off00016421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16421 19040 bytes
SHA-256: d591079a0eb2cba0e9d3e126407bb4e5cf66c3a40e317b7c028bdd556be26a6c