Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb4ccc52cb0b659…

MALICIOUS

PDF

69.4 KB Created: 2021-09-04 08:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 68d48f5c09ff9208f839346e12c3df48 SHA-1: 10c3d7aad7da5eb076a3b9c99bd4f2b03d32ed6a SHA-256: 0eb4ccc52cb0b6592c381fb4524f6a1359e76bc310ea13fb3e7a986aa15a61ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a link farm designed to redirect users to malicious content. The presence of external URI links further supports the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=jurnal+efisiensi+metabolisme+pdf PDF link annotation
    • https://holocaustresearch.pl/nowy/photo/file/borubabulavonutidufe.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/94319559968.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbcd110729---vevuzijemitesotajipolisun.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2d7b849b6---12082304291.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/8b24740bdf6856293ce0f73b02f8f7f1/sibibutejuvotojigupun.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/zumowuvemolalexinig.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/72c837676cb12e953dfbe67f77e005df/9317720549.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/bidokifavipinowukeg.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd561a41f5d---12257494007.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9ee49458---27846007450.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/nqvbifvleiamo8ukkl45pf1r79/pezuz.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab546565ea9---52299936746.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/f362d9494cce951fa2256a61b8229066/fewagiwaxefunupitisoje.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607409d206bab---66516801742.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/m4dfrhfrdtoe108jtn14oc01ie/lowoxinutuvijat.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/mujewomop.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/nobabesebaduperifijovof.pdfIn PDF document text
    • http://waltripclassof74.com/clients/8/87/875eff38522a6836d9fda94c5a2b6b26/File/lujuwibo.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210510045725.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/37ef147fa49d96e9311827747e744007/1301205107.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/venukuzapaligor.pdfIn PDF document text
    • http://hamkr.com/userData/board/file/xakiputime.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/zagelunibamolawexotalu.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096def13cc88---tipamuluxasamomupagejanu.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_off0000b342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB342 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB54 14452 bytes
SHA-256: 7c373e9fb883d0e2243b972d0a65ac91cf67a4c934d9434a0731163c4e8283c0
font_02_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 10892 bytes
SHA-256: 189061b2b7fe94a8e3d0e77d2293723a70b4248cb1d58375801a29b2765c1be3

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