Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e11e30cd4480af1…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 18:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3407f357b1e16580ef88ae19992905c2 SHA-1: 1f2e764ef3e96ef44c8e3492ea88727dce73aecb SHA-256: 7e11e30cd4480af1c03520db49ea7fcebc196e871bb0aeb2e4eebb8ea9168223
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall structure suggests a spearphishing attachment (T1566.001) as the likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=como+descargar+el+emulador+de+android PDF link annotation
    • http://scard.vn/app/webroot/uploads/files/60018448826.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/63422970448.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/losemogoj.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/latilenadopesipe.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210911162850.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/bazizaxegaxovitugowumuv.pdfIn PDF document text
    • http://ariogalospspc.lt/userfiles/file/60375665922.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/47900321322.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/53275740409.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b30f032cf---kajatubekuri.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m03jbi5gtj86p3g8np4lpa2blf/xexiximemugu.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/ponodadefizidatadimek.pdfIn PDF document text
    • https://magerp.org/upload/files/11580137955.pdfIn PDF document text
    • http://soles2walk.com/data/file/75171634741.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/4ed93a1912ba2857ddbdd2c5e69f0569/juwafenukimimi.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/fadiwiwafenivetivaj.pdfIn PDF document text
    • http://yesfabric.com/images/upload/File/28691744010.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/74317837161.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/75392742269.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/dobubuxonaxokelogusesefe.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/49938913857.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021961731112996.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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 10748 bytes
SHA-256: 60904d37aff77e9fe6408d0b01752e927a39afaf66939fe66cd7c43c7b87d7cc
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADA 17956 bytes
SHA-256: 396a97fea595730143e92aea774ad88184b2db78ac971248929df9c3ebedb9b5

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