Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98df747726070aa…

MALICIOUS

PDF

89.2 KB Created: 2021-09-17 12:14:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: eb7b83a01191f66e2e7b263b90b6e1b9 SHA-1: faa7cf25aebf3302ff82bcfbbb8903abd22fc356 SHA-256: f98df747726070aa9dc086caa073f164f624c59046cc90faec52f624e72b9b31
196 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Several heuristics indicate the document functions as a link farm, pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of 'cmdmr6r8ol2m9dhh1b9ka6i7/16067341495.pdf' in the document text further supports the use of command-line execution or obfuscated links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://clairvoyantinfotech.com/demo/images/68995472679.pdf In PDF document text
    • http://terhautz.com/upload_files/files/1495727735.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/kuruwuza.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/14412873515.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/jajamunurifusoneru.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/lebewarufimaxisanezomafo.pdfIn PDF document text
    • http://videocycling.info/files/file/jerubemijo.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/39942146399.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/161366d960c496---fawomebagifuxete.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/dijovobekolikato.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/motali.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/wibalororogogasebejojuma.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/49591787525.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/xobokiz.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/xiwuramotuwiwezo.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161361fb7e614c---32459026447.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/welovago.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021972056384205.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/rucmdmr6r8ol2m9dhh1b9ka6i7/16067341495.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/ramuwegagunanirusevufob.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/jinanakomotibepogu.pdfIn macro / runtime command snippet
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e663288408ff913b2ecaae2b8b3b03a/gowelozukedegimovenej.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/munidopukobajowetivasuxo.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/pilok.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161304a1ca6001---levolojan.pdfIn PDF document text
    • https://pmapmc.com/In macro / runtime command snippet
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+draw+musclesPDF 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_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 18764 bytes
SHA-256: 07c23eb71bcf0cca474b8d669438bbd09e5e4d782219e92a7e654d96a8bbf6d0
font_01_sfnt_off00012700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F17 10512 bytes
SHA-256: e1965084fa45b37a6a41cc5e5afc231cf8ed97342ff108289a836670f343aa8b

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