Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce1f1474e71319d…

MALICIOUS

PDF

67.7 KB Created: 2021-09-30 12:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: a836d44cd1fab9cb2db1dd8a8a5677fa SHA-1: 0cbcdcde01c90cd7e4b61ccc5f1e226fa2bde823 SHA-256: cce1f1474e71319d987b3bd235d7f661093092b35e9e9e5c7aabc2ccb35603c9
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 heuristics, indicating it's designed to trick users into clicking links. The document body is heavily obfuscated, but the presence of numerous external URIs and the ML classifier's high confidence score suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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 1 text block(s), carries a click-outward action, and is only 67 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://alemotta.com/resources/original/file/30187817203.pdf In PDF document text
    • http://abpaluso.com/upload/file/85283563004.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/34033401948.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/15927029729.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/kufifajiv.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/59426406620.pdfIn PDF document text
    • http://rococosofa.com/files/files/dovogujotoza.pdfIn PDF document text
    • https://pasarant0g3l-turbo-h1t.com/contents/files/96722168361.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f1f1769f55116e5a1b52b2d3f1d6f4d/47713011927.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/wuxovabaw.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/30415611382.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/42787570893.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/walolo.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/sotesutaja.pdfIn PDF document text
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210930_091049.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/mimelimive.pdfIn PDF document text
    • http://bretagne.annuaire-regional.com/ckfinder/userfiles/files/jisafosanisidepinuzef.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/wonadufub.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mujaxitelegixadimu.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/mavupegoligegelod.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/25421392096.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202109151157241289.pdfIn PDF document text
    • http://melvin.cz/data/22312997786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=naruto+the+last+watch+onlinePDF 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_off0000ad64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD64 10492 bytes
SHA-256: 91724308b6421d219847ecf10679dc143003c78ce2d87646947dfdd91c281be1
font_01_sfnt_off0000c54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 14452 bytes
SHA-256: d6050a86b22b1dac376557b7eacdeba1a151ab748d83dbd7510341599391d155