Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc4249c0ada1458…

MALICIOUS

PDF

91.7 KB Created: 2021-07-19 15:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5f689a80792528f134050e9b78bb6dcb SHA-1: a2327f296d406a7f8028687fc926898d28ab20c4 SHA-256: ddc4249c0ada14583e877088d546beb8aade202f643832941a2b8d79174f31e9
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious sites. The PDF structure and link farm behavior suggest it's used as a lure, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f4717b83d7a---46800130080.pdf In PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/58261201679.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/4823187451.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/xipurizuxubuleg.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c113b499b1---27743802013.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095e22508f9f---sinezawekitosunawodaruxud.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/92421504969.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce1d229a8b---42637862014.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/0a2240877f85809b8bb1ade429f44e68/zudizeduvekam.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/48649557038.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bab621ce48---fefazusukenulajudanub.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/wiwekovaworuxopazezu.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083281168d84---mekezoxisasa.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/jumeguwororo.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/f0230148d4a7f89cc254dbebc0a68392/vikojudujukowotijorowa.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/97599981734.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/d8ec345f95f0587075404e4db200b1f1/36812580134.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/70029508989.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/16609344059.pdfIn PDF document text
    • https://ebooksweb.net/files/file/79562691400.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/ratadik.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/da39b450cf4fd3737106101f64df91e3/puxevirud.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cb4e60e8e---wanupatedegov.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/7423656670.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0be910017f---batijif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=who+lab+manualPDF 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_off000106b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B4 17124 bytes
SHA-256: ae4c2d4800366fcb95aff18b15e7dccf9ba2ac9f957fb1632ab1166fc111c81f
font_01_sfnt_off0001337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B95 10016 bytes
SHA-256: c21b2b40bc2e4c7f4eb9791d2f81f7adddf9e255415c5172659d50aa7eb083ad

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