Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eafccbead5d6d0a…

MALICIOUS

PDF

68.1 KB Created: 2021-09-27 13:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 73700e2b7213c81e8c994364b7ad19ed SHA-1: 736e3ba9d452da909dd3a28bae7c9925d4f5e5fc SHA-256: 7eafccbead5d6d0ad7c98f322f301971c74ca8f7bd4b6f4cf57856be2e759ce5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to malicious sites or download further payloads. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a full-page screenshot hides a clickable element, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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 https://pistant.ru/uplcv?utm_term=unable+to+install+apps+from+play+store PDF link annotation
    • http://wellfoto.cz/pictures/files/62434402852.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/56532953588.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c011ae60---ragunola.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/mivev.pdfIn PDF document text
    • http://rococosofa.com/files/files/65189841615.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/9025419283.pdfIn PDF document text
    • http://etepi.pt/js/ckfinder/userfiles/files/dunijigokaxinipugi.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/zowowe.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/vonumuwizadasejiwifotede.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/59698922681.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/52462846958.pdfIn PDF document text
    • http://xlith.com/userfiles/files/zusugat.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/gineboxamibilu.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/mowupojibeli.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a2cd48ff6f---fifuk.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/75879991076.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210904205409.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/vatedaxijuzapemuzuwisate.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109250036454453.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1632574360.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/58395270505.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/87126124619.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/dixupoxitarofunafuravinax.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/xetegiwavajobunifofosamog.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_off0000aeb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB1 14192 bytes
SHA-256: b642a5e92dc9d206d4c8644ab4395c3d0c274efe78d6362373eec3eba02d7b12
font_01_sfnt_off0000d1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 10780 bytes
SHA-256: 126831a84ea030d31786040ff6913c884833819bff8180389ec1674d02c119d7