Malicious PDF — malware analysis report

Static analysis result for SHA-256 812ada66f29edd26…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 05:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c545bc1d9e56eebe6ffdad404c4619c7 SHA-1: c6047838d52a1b2ced9e4ad3b95489c215690896 SHA-256: 812ada66f29edd26711d2581152e6d5a3ff377c1dc94e1a25a1b3885bc0af2dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as a phishing lure by multiple heuristics, including an image-only document with an action trigger. The sample also includes numerous external URIs, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute malicious code upon opening or interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 69 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://irlanc.ru/uplcv?utm_term=spider+man+2+full+movie+stream PDF link annotation
    • http://absolutelyneon.com/userfiles/file/malanugozajorizoleg.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/lulosujiv.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/72908910824.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/xemitarerim.pdfIn PDF document text
    • https://doitoutdoorz.com/file/v3cb4c0AYXZxKrNe.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/83309945263.pdfIn PDF document text
    • http://kant21.com/userData/board/file/41178574184.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/12694964819.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/76353129843.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/rakor.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/74064577050.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/44054152100.pdfIn PDF document text
    • http://khachsanmyngoc.com/upload/files/lafawasebutibaxepax.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d5459d450b8d8409543707de3cefadaa/pabovagekajulerofulo.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/nuluro.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/niwagozujatuze.pdfIn PDF document text
    • https://okazionche.com/files/27595677493.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/11193161962.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dcf63d2805---48586563975.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/79962877619.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/virivaj.pdfIn PDF document text
    • https://bunianco.com/other_files/File/fiwutafewaruwat.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/72563997641.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/61303799025.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_off0000b18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18D 11020 bytes
SHA-256: b540b4ab53d61e6224b2474030f8eded8480e0877adb68d9bacd7dd30f400d85
font_01_sfnt_off0000cb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 14036 bytes
SHA-256: 80f20eaefc1db9df015c5d36c6997ff68a6368c2ff706cf1e2ad320d9145b03a