Malicious PDF — malware analysis report

Static analysis result for SHA-256 a349bc97b6bfc292…

MALICIOUS

PDF

90.0 KB Created: 2021-09-09 15:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fe689d08b26217be159875234d5e465 SHA-1: 0da426284e18dfb413121905a5886884a16ba24e SHA-256: a349bc97b6bfc292786a5b2a369b0f34bad04ab8bbe786526dbdc28fa601f971
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f7f90662c2ed10d37aa2d62ca4c0559d/tuwigusuf.pdf In PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/36732625721.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/79580b6710f0a3d7fbe7460a4845844e/fitoxewuzowazodo.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/67741414883.pdfIn PDF document text
    • https://magerp.org/upload/files/59711706209.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/rirerumekajakijulokirok.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/pezowatudileluk.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/12940923079.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/fosekiwigakew.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/88028197039.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/23537752937.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3139d269cb7d8a758461cdb16821f365/69049370312.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/pamavawupimux.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161304268d9a6f---wujewimolukujubi.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/buxewapo.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/35113656193.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16139952ddf054---lovakerumudiruxulozonavu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea356b4586---17237681309.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/80965819029.pdfIn PDF document text
    • https://anjingliar.com/contents/files/rumadobinanexurikutajom.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/kojovarulujakerenaw.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/muboporavutegavewib.pdfIn PDF document text
    • https://laser123.com/geektic/files/58090704607.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/pekokojiwulokedud.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/datokelizewuzedaxok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=anna+magdalena+bach+notebook+complete+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_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 21040 bytes
SHA-256: 3b50c69ed6220ba2e491757b39aa333e8ee6b9696500cd7bf5c255288146eb71
font_02_sfnt_off00014134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14134 10920 bytes
SHA-256: dcba2b352e73ec1e0468cc3bd55d1dce9f57e514ba79af1d46e6971520b8fb48

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