Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b053513aa4357a7…

MALICIOUS

PDF

80.1 KB Created: 2021-09-21 18:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8d5c93c5471185077cba7cfd7a52c0b SHA-1: f394ee7e06b0a06187a7ef41a8b6316a236fea55 SHA-256: 6b053513aa4357a7a3f632b698ae96e6044c62f65410a88540434382c0df076d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and disposable hosting domains. The presence of external URIs and the structure of the PDF suggest it is designed to deliver malicious content or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=uninstall+company+portal+android PDF link annotation
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e736b49f2---segaji.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/dazirefefin.pdfIn PDF document text
    • http://hingliltd.com/userfiles/susizesopu.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16134ec0c31e65---30690383993.pdfIn PDF document text
    • http://www.siposferenc.hu/html/73516403997.pdfIn PDF document text
    • http://spakimthi.com/upload/files/16078144302.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/kesotagow.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161483866d085b---35856890709.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/winasiwawerotaweguvi.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/wubev.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/23465294921.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/fokitenulewineneduvab.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/16147775250.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/46151343244.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/xixajovu.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/zoxigajis.pdfIn PDF document text
    • http://chinalabware.es/d/files/14589877592.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16132737757135---73745297001.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/javomatirepeviwil.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/hvbp3snmgabo1uafmh52es020m/69423345316.pdfIn PDF document text
    • http://shardamedicalstore.com/singhania/downloads/file/20300104231.pdfIn PDF document text
    • https://polaria.cz/images/file/tumarebemopukiv.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/70931507559.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/65045697096.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_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 10664 bytes
SHA-256: e36e99be4011058d6aeda5d162ee7c20b7cd9b3d1f4559b1dcb547f371680314
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 17192 bytes
SHA-256: 61e056dcc5b5e24fb2f1ec37d1d86cc6eb1148114c82ed0e5f91ab08ab4a1dec
font_02_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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