Malicious PDF — malware analysis report

Static analysis result for SHA-256 2892388cef55f20d…

MALICIOUS

PDF

89.2 KB Created: 2021-07-06 04:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2bcdf56f2a993995a89e3a06b4d2b02 SHA-1: 3ef234ab4bfa9fe45cd22e257d980b10e6d6c750 SHA-256: 2892388cef55f20d5324bb391ac305b6c5276f9d03ba18266c6c289401805432
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing or malware distribution lure, indicated by its use of link farms hosted on compromised websites and disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further payloads. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to host and distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9e2bcefdd---35840617772.pdf
    • http://zaun-produzent.de/userfiles/file/dezibubopanozatat.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aeff205e9cc---mipafalavirozazimoli.pdf
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/lipofo.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086714302b7d---xibogimulefijasodabijawem.pdf
    • http://ttmplus.com/userfiles/files/geketupozapina.pdf
    • https://anmoul.com/userfiles/file/97515990595.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/41845906571.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080309f45384---29005579978.pdf
    • http://santeh.md/img/files/xulogivikugudojadipa.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/d5ae9f8384fed8cc774e2dcdf3587045/forusam.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef0378db4a---81648180103.pdf
    • http://www.motorradfreunde-toggenburg.ch/up/files/nesujetixubobuza.pdf
    • https://sonarmusic.hu/up_image/file/90567494525.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f6ff820ce---larisofimonafodarudu.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8bfd953d93d0c2a9c91e0b82e856df1/494164567.pdf
    • http://aylincinarli.com/fckfiles/file/kenoro.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/cfcsid6cb52ns7rf24h4nkgao4/76318329036.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cffaf72ac7---93036975569.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4fe27350---vadupijogiwevim.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/a34235263dc16f95746d5422492d9a00/pukovaje.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/2b8e694470f1a78cda417ef779e5df72/22996241929.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cb7a034c8316a8da17d09253615693b7/32811480495.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087741dbdbe9---9248523421.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=premam+dubbed+tamil+movie+free+download
    • 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_off0000f957.bin
76897d8e3dd3e2f8ee20db731aafafa08d1e9f6a7bce1565d504c465b6b2e200
pdf-font-stream PDF embedded font (sfnt) at offset 0xF957 17248 bytes
font_01_sfnt_off0001267c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 16792 bytes
font_02_sfnt_off00013e93.bin
3de9a7f4815e3ec4e417340331bc3531c0c7cfb52aece133b439272bf9820312
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E93 10740 bytes