Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f0cac2b0eca217…

MALICIOUS

PDF

80.8 KB Created: 2021-08-09 01:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc1515cdcb06784ee9e7eb0f1230d1e9 SHA-1: 364fbc2df786affcbf9a4d3a80091aacd915d312 SHA-256: 12f0cac2b0eca217c54983b50bc91851195c1996efa18f2089a961054858fc2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct textual clues to the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • 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.
  • 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.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/acf55edb6b641aad37d60e31f8aec832/zefixuxavujumufobolevap.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/58185820164.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f1085467fa32eea0cfc1e4b1bef7b5cf/44883195386.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/36c96db0398e3d2aacd0dc1e09f5265b/padeponopibopepotu.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/2a6dd892caab99d30140932e6f695928/90349050729.pdf
    • http://doublehaircenter.com/upload/ckfinder/files/52516194649.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6bd6baad5---lemigedenajisowa.pdf
    • http://guchenes.com/d/files/30355844385.pdf
    • https://ipic.vn/userfiles/file/fosiloferuxesuzuz.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/45ffc36704c06b665f76827eb1708968/ledigofiwazasalemogapaza.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607399a98c3fd---bakorego.pdf
    • http://bigband-ulm.de/userfiles/files/98993411576.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/up45g6jgdr13s6rn3rjrqgpn68/majemaravevurefaxojot.pdf
    • http://fullcolorspandoeken.nl/userfiles/file/xifarekajekilipupijux.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a397db09971---92991119645.pdf
    • http://keralabiblesociety.com/fck_uploads/file/bigasuriziw.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/o36v7l57qttdjge66n105q10ok/65105902495.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1b4b96bb6f0e757bba96af7509f143ff/sevejakotatugilagezik.pdf
    • http://usmleworkout.com/files/file/gazivozurapol.pdf
    • http://prinsart.ro/uploads/files/55436585076.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089de45e3a0a---38801959419.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9fcba2e15---fusugilajegezixivom.pdf
    • https://ms01bet.net/contents//files/20412955405.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d2a31c439---momuwevasixatadimovi.pdf
    • http://liga-stf.ru/i/upload/files/dosudunuzolem.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=la+bella+ceci+y+el+imprudente+capitulo+31+facebook
    • 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_off0000d3e3.bin
fbae3b25ee96064137650f34f21b412262a642e7a17ebb2fa12742b02ae40b44
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E3 11240 bytes
font_01_sfnt_off0000ee10.bin
f4037f2b97f65818d67e3b998ee218f87f4f0a75f0f0733b72c4f9b046c46d8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 18132 bytes
font_02_sfnt_off00011caf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAF 16792 bytes