Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0618898a4f75d06…

MALICIOUS

PDF

80.2 KB Created: 2021-09-01 11:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 48b60eaa30f61110a0aa2facae0bfbb4 SHA-1: b827013aa397b5420daaaa9067cf557489e5e456 SHA-256: d0618898a4f75d063849cd237acf07bb88a674649cf00aad22b6d4a148625ac1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous links, many pointing to compromised WordPress sites, designed to act as a link farm. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf140ca8fe---66723309365.pdf In PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/b5e0de62763ca4667e81b2e190d7857a/34845229877.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a4cd4d8b9---6326691577.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/mjnathel6b5vfsd652q9v1eq9l/93135124917.pdfIn PDF document text
    • http://arslanemlak.come/file/6404081366.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/48858748137.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210901142143.pdfIn PDF document text
    • http://maimungkorn.com/UserFiles/file/43796095306.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/pepagelivafe.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/juwenixavazase.pdfIn PDF document text
    • https://dptech.vn/uploads/files/widemakuruvilutum.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eac281b90---95384530225.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/7fe0fc59fe829ee897dea035fe044233/fejowibevejipis.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/60083283332.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607a332ce5c30---35012829783.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/basumebimezikopa.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/28712365048.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/towigugag.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/icm1g91citb3704jhdobf10buj/tamutafavilifobafitabusow.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/22c29944b64151f3dec36a5db8f5d2e1/18871625060.pdfIn PDF document text
    • http://getem.plfiles/file/26110649957.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/ravupomibum.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/455b7a8e797139438284c73c036c9b90/64562710576.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/92517099551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=house+for+sale+in+brakpanPDF link annotation
    • 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_off0000d5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B7 17584 bytes
SHA-256: b00290db9b9e7375a3276f488da69eca6e758985a066587ace1bf89a12a080aa
font_01_sfnt_off0001035c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035C 10576 bytes
SHA-256: cdfe391fb74df6bf568e383e4689aa6a97b9364478d8fad8513e7a9d6c49ec62
font_02_sfnt_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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