Malicious PDF — malware analysis report

Static analysis result for SHA-256 318628eeb404c2cb…

MALICIOUS

PDF

79.5 KB Created: 2021-09-07 18:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 72320347a0b1c536dd3393bc2ef26c9d SHA-1: e9c5612846d5e5dd027f24400296b58fffb6dcb8 SHA-256: 318628eeb404c2cb83cf78c4235a0909cf55e3f61e92e9ff851ceff27592905b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms, suggesting it's designed to redirect users to malicious content or phishing sites. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • 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.
  • 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://wastran.ru/uplcv?utm_term=scansione+ocr+file+pdf PDF link annotation
    • https://eternalbliss.net/file/11226994841.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff6be334a---mibirasaso.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611001b045e7f---pezebisagoxowanan.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/78959504169.pdfIn PDF document text
    • http://www.og2c.com/images/file/domaxoximusi.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/81bde643bb6608d9ecbd5f33ea304c61/70671058449.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/nejizixutosonafigi.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b4b942c8aa715613945b4a086cc153aa/sidizofifisuxodasen.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/83592652149.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/debivuletaxiruramamu.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/junulanutivamuwaromawinas.pdfIn PDF document text
    • http://hudsonohiohighschoolclassof1980.net/clients/7/7d/7d4b1ad73701457990394555a34ab01f/File/joremitixiwetuzilepivav.pdfIn PDF document text
    • http://kalikraft.com/images/file/jalekanelokebe.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210818174229.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/7728623843.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/kedotojukazojuso.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/poziw.pdfIn PDF document text
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/kaminizafobufumaxoluxu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kemojililuxekorudoxo.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d74d525727e---mukiwarorilijepizodu.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/kejoredomuvifu.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/turitovanafaded.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210813203816.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/44131713095.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_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 10588 bytes
SHA-256: 069bd1874e3c3a323ba70cb04a5ec2936faa6823fc4092acf5586e97338b3d04
font_02_sfnt_off0001031d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031D 17628 bytes
SHA-256: 9f7334ac73be56058e272ba9084485cdb72cc01459d7778a1cfda3807755395e

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