Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1199fc77b086b5e…

MALICIOUS

PDF

74.8 KB Created: 2021-09-22 21:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 91c7f832eb542253649da037aa035275 SHA-1: 5941b43e684b44293e1cf4b3ecde06a74bf75b37 SHA-256: e1199fc77b086b5e46572664a9896ed4d6c441e64e33d7acbb7c7a10cec5df93
156 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 disposable hosting or compromised CMS upload directories, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns align with common techniques for distributing second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 https://inwebjor.ru/uplcv?utm_term=harry+potter+hogwarts+mystery+mod+apk+unlimited+all PDF link annotation
    • https://arbormaster.net/uploads/files/davarinegepad.pdfIn PDF document text
    • http://abworder.com/uploads/files/5266502192.pdfIn PDF document text
    • http://herve-coiffure.ci/files/lokiw.pdfIn PDF document text
    • http://gavionescodeinsa.com/userfiles/topegowixumaxita.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/limotataxegesuxogo.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/lozepeforomewuwevekeka.pdfIn PDF document text
    • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/67693691505.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210905_0A6C070EB54A82D8.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/relojodevoselufiponagidiz.pdfIn PDF document text
    • http://cesvil.it/filesUploads/file/69279885217.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5c7a3946d---gagitipafivesawo.pdfIn PDF document text
    • http://quangcaowebsitecomvn.xemlaco.com/uploads/files/97356849209.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161420b84e62b1---subebunarutuxa.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210920233056.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/35383392006.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/mowokupik.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/kusazarijipogajewulizuj.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210914082421.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/jazurekibedapewunowa.pdfIn PDF document text
    • https://menu2uplus.com/images/file/patevetetipudafudimojeno.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/73772977859.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b942c1924b5199c53a0f6ef6fffbb781/nubinigak.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc49ecd951---71500827487.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB342 11220 bytes
SHA-256: b6dcf7db828175489a80dbff18e1f57e9dc764bf0988fe0448f66b0686d3cdbf
font_01_sfnt_off0000cd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD29 2660 bytes
SHA-256: 0588d08630a051700f11095ee28527d2347c4ae8d87849bbc974fedd0bed88f4
font_02_sfnt_off0000d827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD827 17488 bytes
SHA-256: 3691b79f8877fd319148601590f17f5e2c142a5b3fbcd0f1252bbb9cbf9238cc
font_03_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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