Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b275796195ac070…

MALICIOUS

PDF

78.0 KB Created: 2021-10-09 02:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2ee610c1ae0cf4ad1158c5e3a91f00d0 SHA-1: 100974678a34615a898b12cdc05a6784e78e27fe SHA-256: 8b275796195ac070e036cbed4419577c2e04c7f19a324d072c4765afaa3c5b6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm likely intended to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, suggesting it is not intended for user interaction but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=english+vocabulary+in+use+michael+mccarthy+pdf PDF link annotation
    • http://wsospice.org/uploads/userfiles/file/file/27340117237.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/39460468571.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/genogajudabibagik.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/tavukuxulolidowasebewisi.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/466c679e869fa32c92a4c1b242e28a65/nateveki.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/dajubutogelonujex.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/29604901135.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/lokix.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614416dd1bf26---waboguxig.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/pewufu.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/dezajopebirajid.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd396ed2fc---bikanuledanazerif.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/siverosenufupujivunamux.pdfIn PDF document text
    • http://sb-78.ru/files/file/nubodikuzejebo.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/36136081416.pdfIn PDF document text
    • https://gilbertems.com/videos/file/tadogimisizadololipug.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210906_36B968F06D46CCD1.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/3589c4088cfc8401dacbfd9f8fc5f1f0/goxitezalimum.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/xozodesem.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ddurgt5vc3621ucq05d42utjc8/50332866263.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/jopen.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/zudatuxotimenokotedutuxa.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/dufikinapipojozufazi.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a928be0a73---nepuvawagataxo.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150d1b20da25---dufujedemufogujer.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_off0000c8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D3 11468 bytes
SHA-256: 92dfa15124cdfd942d17417f57a4c454c455a762b1172c9e68a690072ea3b6c6
font_02_sfnt_off0000fb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 18364 bytes
SHA-256: f9f2a6154bbea493bef6f19019ebd76d10b9d1c48cd65c9ce40b89748290be0c

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