Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a07e049835ac0b…

MALICIOUS

PDF

78.8 KB Created: 2021-09-18 15:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f4f02f430db27401788aa3c11a1f78e SHA-1: 4a8a14dab6bdf97803182bf684054c7345b1d9ee SHA-256: c6a07e049835ac0bcd8cab16db36e6b5fb9de0ee276236ea9dfe37f76c105491
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The presence of multiple links on potentially compromised infrastructure strongly suggests a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://bobas24.pl/Upload/file/zofezebagomodozunaraduz.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/99fbce45fb2696041ebd85a7d7a63c21/99096866508.pdfIn PDF document text
    • http://exosushi.com/uploads/files/wogivasawoxawaxedol.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/20698606033.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/62cc7eb200b2252610244451ca516771/37348836048.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/garewinufezovaken.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/favisor.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/vevazar.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132b8a257834---vivuwaxumexoterul.pdfIn PDF document text
    • http://omni-links.com/images/blog/file/xitesano.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/11223218594.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109080050025603.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210909_6A03DBB6AD0A9AC5.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/wozogavo.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/fusovonaje.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161431c5e8d0d0---44564188670.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/94976909222.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac15292789---ravope.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4815acdb4---losudidilixebokur.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109161258487827.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/12404794616.pdfIn PDF document text
    • http://waxiangyuan.com/upload_fck/file/2021-9-3/20210903050108797464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=animation+program+in+androidPDF 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_off0000d0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 10368 bytes
SHA-256: a442ae005284c777bff673aadfea6b2264c5f40787c6d6f3aea2de9b14e14965
font_02_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 17448 bytes
SHA-256: ad2dad8abb88034c1a325c590072d1568d20ff080f7e73fb72419a4130de65b1

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