Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ae5e6d360950e9…

MALICIOUS

PDF

78.9 KB Created: 2021-09-18 02:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 68af55b89775888f1bd1cb872ba1c490 SHA-1: 9c89a31c895251cbe0c904231de7df7e78b3821d SHA-256: 01ae5e6d360950e9d83954419fa80d25a2f6cfb7949ce35b485e189001f5c5a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many of which are part of link farms and utilize UTM parameters suggesting search terms like 'download wazobet apk', points towards a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://huntic.ru/uplcv?utm_term=download+wazobet+apk PDF link annotation
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff4fd1c2da---lefogozu.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/fonujazalesugojelarapop.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/91950287398.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/nasobojijodejepigugile.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/wivalafarodez.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/48966275172.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210904025440.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/gowajujepupunitaxatedap.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/36302577474.pdfIn PDF document text
    • http://mebelhotel.ru/userfiles/files/57178489568.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/52548810950.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/84651299436.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/weralogatajapemapeb.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210905045739_u1z072.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/pitokupovusapupoxim.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/siripezupegevewis.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/58109155705.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/84243318005.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161426ebdde7e5---jonemifagegavisafite.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/2021916157443124.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/83926669904.pdfIn PDF document text
    • https://ysh.my/userfiles/file/kifisuneni.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///48332898350.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_off0000d05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05C 17996 bytes
SHA-256: 8612a8251a145ac69fc809caef4cc98c4977f1b308e2b8ef05455bf48b896862
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B0 10404 bytes
SHA-256: 7397f32136167eef9b2b3444a313bfb92ff409dd606c061b30819e7adfd6b288

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