Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e70472f814237e7…

MALICIOUS

PDF

76.2 KB Created: 2021-09-11 22:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6947ca14382aa3e972346c57b6f7844e SHA-1: f125da41c99648092bf6450cb239b616b00ab8f7 SHA-256: 2e70472f814237e74ed8c39d2b90690f5ae165a35550caf7312836f14db64cd0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous external URIs, indicating it's designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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://huntic.ru/uplcv?utm_term=bg+live+apk PDF link annotation
    • http://artepcb.com/upload/files/90545868755.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/wejagizofadoxa.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/tigejilajojizopif.pdfIn PDF document text
    • http://ellenia3.eu/userfiles/files/29899486368.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/45899656461.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aae430d794---86809298307.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/kapowata.pdfIn PDF document text
    • https://anfauglir.com/images/file/64001092857.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/4539340708.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/53266202964.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/bozuxipivepenarozux.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/37898990779.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/dejelad.pdfIn PDF document text
    • https://dottoridegregorio.it/public/file/mufozoxinap.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/2671333469.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/60264609510.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/vutinegakajubodubo.pdfIn PDF document text
    • http://markone-tools.com/upload/files/54584747124.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210907/file/27847357450.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/sijilix.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/730217501.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/fepevu.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/sipatixutomugumet.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/18997380902.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_off0000c525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC525 18604 bytes
SHA-256: 4d7a75951b72169bfafc97d571c93d38a4e4450ffb0621c0538e9dd967d4bb25
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 10048 bytes
SHA-256: e0e4b4f37867ff36c57354195e229013a50e5c2f1c99f4d2cb41c1d53c9bcc12
font_02_sfnt_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1