Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d62182f7fdbf8a9…

MALICIOUS

PDF

70.8 KB Created: 2021-09-19 00:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a144cb5b3e2d4be3f498f6c3b921dea2 SHA-1: c78c701fba5e10a71314b0ae236d99e94ac0fed9 SHA-256: 7d62182f7fdbf8a97e92681fd9f23a4d29d09818aec54607a60874254f588872
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://babetravelling.com/ckfinder/userfiles2/files/xixufeputo.pdf In PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/kiverizagelar.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/dojujazakexoparo.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/96839812958.pdfIn PDF document text
    • http://villkasz.hu/editor_up/29970066866.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/90367822905.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161462ab95577d---morulifozarujo.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/58555137998.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/rigisazipubimifividotajij.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/55283337895.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/7551585198.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/kopitezevojilavuxut.pdfIn PDF document text
    • https://attack.lt/images/files/52836919342.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/xatuminu.pdfIn PDF document text
    • http://steinemann-ag.ru/raronagowiker.pdfIn PDF document text
    • http://plncse.hu/php_data/file/miwolizofexopaxibilixav.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/kemij.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/14645651789.pdfIn PDF document text
    • http://giteduguedesboires.com/userfiles/file/67720529611.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/jinofozuvub.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/muved.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/27722852316.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=gun+games+offline+for+pcPDF link annotation
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/gamobabulokotu.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_off0000b387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB387 16304 bytes
SHA-256: 83c3e47485e0b73ec8dada88e99093ed47e8c6c16612b3f63989a976fc410c66
font_01_sfnt_off0000dceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEB 10864 bytes
SHA-256: 06912d46d2684bd787e2069f174904190e38e034060014bc28154b1f87040e1d
font_02_sfnt_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1