Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb90199efba68069…

MALICIOUS

PDF

68.5 KB Created: 2021-09-30 17:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 7204b16c8b8239d04ed504fa982f34bc SHA-1: b244b8d9192e389c4a8c7c880087694df44b8f8e SHA-256: bb90199efba68069981e967f675c91526261ba2cf2097d7e8d0edb688565366d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and is flagged as a phishing lure, typical of malware distribution. The document's structure suggests it's an image-only lure designed to prompt user interaction, likely leading to the download of a secondary payload. The presence of numerous external URIs, many pointing to PDF files, further supports a phishing or malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://budgettranslation.hu/sites/default/files/file/kesarininamiwijutu.pdf In PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/83388653954.pdfIn PDF document text
    • https://12waktu.com/contents/files/safipelemijomirefutema.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/sazaxumozi.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/wovixawimilujolapogavas.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/keferutiwaguw.pdfIn PDF document text
    • https://shoppingplanet.cityplanet.ro/ckfinder/userfiles/files/45153902185.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/bisexafoduvafevigok.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1615335de3e324---jenufoxize.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/wodelopejeg.pdfIn PDF document text
    • http://zzquansu.cn/d/files/70179871339.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/64831356993.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/vujuxovikunal.pdfIn PDF document text
    • http://riversedgefm.com/files/file/82230403189.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131099a5e36c---70300126426.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/11773072352.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/24751093744.pdfIn PDF document text
    • http://babamoleskine.com/files/file/3453831442.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/9128159266.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/31741156598.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/21766188108.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/rewofikalog.pdfIn PDF document text
    • http://begues.mobi/userfiles/file/sutegunedifunomi.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/sinafofedefuruxetib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+move+photos+from+sd+card+to+phonePDF 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_off0000afac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAC 14244 bytes
SHA-256: 528c51c4372816ce923304cb71eb4011cab1e86d88c47d9f27b5d8ae3f529fd9
font_01_sfnt_off0000d335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4C 10892 bytes
SHA-256: e8e7992d5ce3a1e7312fa1351ec00e0a249dbbb4ad8e528d8428d618d98d24e3