Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd49ed068371ce89…

MALICIOUS

PDF

83.3 KB Created: 2021-09-18 12:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e4e1c541ed13f137aee709e4c6844c27 SHA-1: 27bc0c42800b5be51f023cba2a27cae3f0a23e61 SHA-256: fd49ed068371ce893eae277fad0bf6bc17b374896eaa2f6c7e9de07dadd011d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file 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 ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://cructi.ru/uplcv?utm_term=radar+hack+ml PDF link annotation
    • http://xn--h1acbpobggs.xn--p1ai/data/files/52224422824.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131282f5862c---80599686939.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/forifugipedilaziduga.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/nibugexadomitobuloropon.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/fapebiripedomivenadikuz.pdfIn PDF document text
    • http://otczenacts.com/media/files/7555521129.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5481357de---94605996066.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614170c9571e0---jedobebixewirebe.pdfIn PDF document text
    • https://ikima.fr/uploads/file/pifolidedume.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/76989737031.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/tafowokeninitosumij.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161429b255bb0a---56564370905.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/9412835553.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/bijup.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/zuxeguwelipapofofive.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/17815319384.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613423c29fbd3---popujizuj.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/67374551452.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/popezonusejatirok.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210914125129.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/85183478705.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132dd76d97d9---97697043985.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_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 17964 bytes
SHA-256: eef626277f1687b726365d53a07e368407d23c1dec12541d983ca6296115ec75
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 10056 bytes
SHA-256: 075da873059e3cc59e69abb3002f367f92b4dc4f01f12475274b92bd6e912aa3
font_02_sfnt_off0001279e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1