Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2e35f80354e40d…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 22:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc6e135f25447f9ed319aa1a38118fc6 SHA-1: 9eaa9c27af1fafb27bf2c4596166fe20ff908385 SHA-256: de2e35f80354e40de4a25844dd2a2ac5d3c1b22ebe3fd6ee2170f8886caf77ee
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to host or redirect to malicious content. The document body is heavily obfuscated and contains no readable text, suggesting its primary purpose is to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1a3d2d75f---28003437020.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070ff6ebf462---31856607776.pdf
    • http://occahomesearch.com/userfiles/files/32653998743.pdf
    • http://residencecarlofelice.com/userfiles/files/vomodaf.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a31483c27d2---tizozigeku.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/iqlur71o6mcjo92715hgtqomu5/xumigexebulexovavotoxi.pdf
    • http://eko-inwest.eu/upload/file/11575170084.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/b8c9a7ca480f69707bced1abd14eb403/22830308741.pdf
    • https://nestsearch.in/admin/uploads/file/28802124647.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/7v8svefbe0bril5vp7l5ub6v94/fewalikiloluburulid.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160a723e853455---dotebixupo.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad5249660---diwegalapo.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16071c0153bc68---10189650345.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760a533d158---xokilu.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085947b7eef2---tejuvugadis.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/1e58d82f941f4cb8218984691a0d45b4/pikelolupe.pdf
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/7318673e2d36279b27c2c600b80f26c3/35493512086.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160944a76a1631---dukutimasifebefeputafu.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/be00d98f9c1f2d1f8af802fa40f75608/xumikimoxenux.pdf
    • http://hysansam.com/fckeditor/userfiles/image/xofoxisipa.pdf
    • http://gmkms.net/upfile_editor/2021/files/tonoziz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=fnaf+world+for+android
    • 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_off0000e027.bin
5a4197ff0a79a7036ae4fb8201b78d3fe2580b3a80ff9392f0efc503d2b73037
pdf-font-stream PDF embedded font (sfnt) at offset 0xE027 30056 bytes
font_01_sfnt_off00011b0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 16792 bytes
font_02_sfnt_off00013322.bin
8bc790326767e589449bcd187ed400b678b56935a760e6b7808514030e7ae0b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 10012 bytes