Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8da409478a09cd…

MALICIOUS

PDF

83.6 KB Created: 2021-09-09 08:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a149b82051815ccec216020fc72ebd83 SHA-1: ddba7df38522d320878fc060ee94396af3871dfe SHA-256: cd8da409478a09cda23ed563a415b605a1dc6ef768da99056fb0e7254bea03c7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ba23b1c33563fd9dc8800620d07e4f11/jugugudelitimog.pdf In PDF document text
    • http://hotelrefah4ter.ir/basefile/hotelrefah4terir/files/28067227469.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/nalobupazaripelukobamowa.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/giwukudenela.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/29176109804.pdfIn PDF document text
    • http://finadev-groupe.com/userfiles/file/vasunujexipibenatodopiko.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/99815951384.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/matuwulilelenamekewexatig.pdfIn PDF document text
    • http://yejida.com/userfiles/file/teketekosixepajifi.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/3d031mitdhcmu6t23qhvo3oha9/xomiwa.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/duvuxabewaviliduxusugo.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/norozobigumatuwe.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/61728382741.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/56667384201.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/dovoterowupu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138ad35b69d8---27504665910.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/80046054688.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/zalipinuzimufekulurux.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/83567010470.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/36514716212.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/339912fc7021c4cebbeff551038452f1/3700028648.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/xijulazonizani.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/86021797065.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135960850bdd---56155556606.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/tuwavupubugamexagutatanib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gujarati+movie+download+sitePDF 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_off0000e2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD0 17412 bytes
SHA-256: a6a2c76297599812d7d63730b9495f93c2c70ac0c973f999d5fc764f15b28b56
font_02_sfnt_off000127d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 10832 bytes
SHA-256: b16ad2d6eeeefd93b5528a66ba12ad3447d738ae128ee7524acad4f862c01134