Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de2a0f39e4d8fb2…

MALICIOUS

PDF

80.1 KB Created: 2021-09-17 15:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9c11efe44dc5fe59f858ab779b10c3bf SHA-1: 99597aeebfcff4de5bb86c6a8ac38741d3c79ac2 SHA-256: 2de2a0f39e4d8fb21057ca4d6024cd3f3014230f68bb9ad5280cf654af9f121f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms hosted on disposable or compromised domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://garglob.ru/uplcv?utm_term=layers+of+the+rainforest+worksheet PDF link annotation
    • https://tradingphrases.com/userfiles/files/2553586658.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/voraxigoro.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109160914488625.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/7922487899.pdfIn PDF document text
    • http://azizolace.cz/images/file/54149146407.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/jerise.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/98216990909.pdfIn PDF document text
    • http://scro.ru/pic/file/49367169185.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/galoferewa.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141ba112dc38---96734426443.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/97586175989.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/borurum.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/fesutiz.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/gonezozijo.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161324aa55bf52---bafawininuwosokofumapus.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/sepuzivunobizidotuv.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/73602472889.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090422310873499.pdfIn PDF document text
    • http://ttmm.co.jp/ckfinder/userfiles/files/14017370017.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/088ed72495eee866ff3e15116b884bba/zokozisufewoda.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/pewevadapiradej.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c74b26511---mupiwedinemuzafave.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/48393565870.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_off0000d4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 10516 bytes
SHA-256: 4b1c36f3e25632d28d2684166b61981be8f95176ed5ffa7c8053cd8cb22c554c
font_02_sfnt_off000104d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D3 17536 bytes
SHA-256: 7f4c067b189a508571a3f79ae9831b157458d4ae17d7292b5bfc03a01ccd9824