Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74e5c8668066048…

MALICIOUS

PDF

80.7 KB Created: 2021-09-23 19:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 88af8985d9cba8dba7032c49bf31ce90 SHA-1: 81c72b18060befb84abad4c2624230cc09f38a89 SHA-256: e74e5c866806604892c6fa970a8732883f4017ab29b2f2fe5cf0f84ad74ad9f1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded JavaScript likely facilitates the redirection or download of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=how+to+check+database+in+android+studio PDF link annotation
    • http://kommunikator.nu/demo/userfiles/file///56520070339.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/luwifafusobojapigigodorix.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613246a37e3ba---zixifefujuzenimetizeri.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210920025333272.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/rofaguwujajo.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/58052086457.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/vabut.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/kafipamazi.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16147ff2529b22---jugaminorolupi.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/jugozutevom.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/jogufibafoximatesupelalu.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/bozepelumojugepapowi.pdfIn PDF document text
    • https://unitedpetexpress.unitedreloth.com/ckfinder/userfiles/files/gemedusijirikis.pdfIn PDF document text
    • http://greenflameenergy.com/userfiles/file/88946578060.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/mijajozulabe.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-6/20210906145707271618.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/dikidolero.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef9b94d6d7---diwisavuteva.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/68287724171.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/fisiduzuvinepum.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b95bc3235---56440180579.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/fonotowelegob.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/62359284470.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 10832 bytes
SHA-256: 3ecf8453536b91c8e5574c5da35d8a48307b3b2a0cadb001af39e7ab3dc7fed4
font_01_sfnt_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 17936 bytes
SHA-256: 24b4a83f53c198a12401c171d0d3f4784ae01d6ae8d2819b7c2732516b1edbd6
font_02_sfnt_off00011d03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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