Malicious PDF — malware analysis report

Static analysis result for SHA-256 366a867d84ccc943…

MALICIOUS

PDF

85.3 KB Created: 2021-09-13 20:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6884d3e10e17d0e6964355bb80fc7daf SHA-1: 99e4846d444e68deb5428d9c70345ea4485495b6 SHA-256: 366a867d84ccc943d46733e631fc5d2cce48a3afc4cf524ce589ee0421cd65ce
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The heuristic firings indicate this PDF is a phishing lure and has been flagged as malicious by ML classifiers and ClamAV. The primary attack pattern involves using a link farm to direct users to potentially malicious content, likely for phishing or malware distribution.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/uplcv?utm_term=plants+vs+zombies+heroes+free+download PDF link annotation
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161392fb044d63---483155634.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/xavijiretoxisi.pdfIn PDF document text
    • http://hiniceshine.com/upload/92821808183.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/64639705781.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xolepazomesilajoxabozerav.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b7206f769---49064687193.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/gukavudanomi.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905075338659.pdfIn PDF document text
    • http://sayarbobinaj.com/file/70434865840.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/539fec8ad7539c2f0b3fb98285239c67/nalitifijagori.pdfIn PDF document text
    • https://preciseenergygroup.com/media/fexavewarozumixoxo.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/jomeki.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/95723497624.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/zexoxiwitogili.pdfIn PDF document text
    • https://macroedunet.com/userfiles/file/90771695562.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecf123b4ea---xomuvupebadiwedid.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161305c0f27ec4---58487790058.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/livagoka.pdfIn PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/kolej.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/88345159818.pdfIn PDF document text
    • http://yousefmaktabi.com/ckfinder/userfiles/files/23215858197.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021911128197946.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/72dc7120a2b1c9a8d2c00b14e89c6dc7/rimeb.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/u9qt6k2l0a11cs4ktvcv34cksm/38556565038.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_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 19800 bytes
SHA-256: c28790997e2df31810a1bd6fd31b2dcadf65b572bb9c3ee2dc62018938c8a186
font_01_sfnt_off000115c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C4 10972 bytes
SHA-256: 75e157d58e56778dc4e65f1b0e65879a6aeeddd79a921ca710ce3c4633637821
font_02_sfnt_off00012f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.