Malicious PDF — malware analysis report

Static analysis result for SHA-256 977f89a9042bb057…

MALICIOUS

PDF

81.2 KB Created: 2021-09-11 16:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 566c7bebe55b2a9e383873086bb750a1 SHA-1: a97c7b01a8cd3cc4399d3ab8d633b343f5a37051 SHA-256: 977f89a9042bb057d070c9552b167a7550efd2a9f022addd1b3bbd3761a4529b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'crewmak.ru', which are likely used to redirect users to phishing sites or download further malicious content. The PDF structure and embedded links suggest it functions as a lure, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=iphone+5s+32gb+price+in+bangladesh+used PDF link annotation
    • http://sakaryakasaplarodasi.org/userfiles/file/zokozizumow.pdfIn PDF document text
    • http://bamor.org/userfiles/file/67987997169.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/rasipijiriridizij.pdfIn PDF document text
    • https://fibra-optica.ro/ckfinder/userfiles/files/29044148309.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/73543055622.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130813e7e359---78486999280.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/jojukemagojusomo.pdfIn PDF document text
    • http://contextuae.com/resimler/files/zenetekisoxilavomavu.pdfIn PDF document text
    • http://sbairs.com/datas/files/duwikodepobomovu.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/19126956131.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/gogepozo.pdfIn PDF document text
    • https://alsharqcc.com/userfiles/files/68389812678.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/sezutadigefexoresimuzizi.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/nidurazagaro.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/exesedigax.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf452e796f---78028017980.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/69290370848.pdfIn PDF document text
    • http://ymmicro.com/files/files/55952480953.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/31185775200.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/nuzowalelot.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tofifonejagedi.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/befejejuloxogi.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/47544170535.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_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 19264 bytes
SHA-256: 1e3c322f177745f89227c119a032e59bdeea20e7251d3039e602a7d8adde559a
font_01_sfnt_off0001051a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051A 11312 bytes
SHA-256: ba6b714f4f73d63ba3f85d85895d59f531556b48ccccbed5d80623edea5b491c
font_02_sfnt_off00011f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.