Malicious PDF — malware analysis report

Static analysis result for SHA-256 30703fc38086005b…

MALICIOUS

PDF

97.9 KB Created: 2021-07-25 21:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93aa86fce132c232857bed31d9b29296 SHA-1: 42941081f83cdc53227a18fe6dfdf0e34bd0bd1e SHA-256: 30703fc38086005becd00f186297247be1fbd3261873677e9981cb2d3d390fbd
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1ac5f60840c431674bfb5897625ed49d/21968674235.pdf In PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/vabivaxafatimer.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8d0b0b237847c4449155973a1183a9b4/joguduteximol.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/hbmosnuib8op9373ncdk2vi41i/98393089008.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607841c2d9fb0---powuxogidebawukuwiwagan.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9a0acc89809ec37ce4673d4b3960cdd1/63958210027.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a55e3dbedf5---82754870733.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/82612499817.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160ee36af73558---lekekavena.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/12927834332.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/c62c98ecd91a99b9ba334b73f24f2f9b/duxelibilure.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/escemg4f1q3pthpjn55n4ftmcj/rapodapedowudab.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608854a492e18---darimitonufubudobuvejosez.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160960a9f4464c---23929445698.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fsin0h6cjeoi4rune34lg0ubg6/87496432596.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/69340030473.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cde0abefb86a4d2166f1c60d213ac163/wesisewinerorikinowim.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d7b4b2a6b08a4d4e877cac55fd74df0e/paninoxoxefimike.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/8441340384.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/9ba96a0e9197b3e0fa7f60e32ed64c49/tonupoxegurogupitujaw.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/xumenizi.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/73dd07d9f03fdc6783c2f6c6bc5ee01c/mosena.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/84686329330.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a6b18f858b3---jonuvorarerowibexifidip.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/danozowowesuzof.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7970ecb6a---32637511738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=common+core+readiness+assessment+4+answersPDF 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_off00011aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAE 10680 bytes
SHA-256: 817ee3805d593c9b17aef665bf08fde0bf02286d3a67ee5aa115d0df1baac057
font_01_sfnt_off00013347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13347 17232 bytes
SHA-256: 37bd8347a0b2a925e99b898c3914fd36a234f9a4d27440035624d3b0bded6143
font_02_sfnt_off0001607b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1607B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1