Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ea7157c7afe713…

MALICIOUS

PDF

73.4 KB Created: 2021-06-18 21:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 02f761564fe1282e8a0eec1af26a6e78 SHA-1: ff8c09cc3ac41fbc453d6239973ade5589a70736 SHA-256: 94ea7157c7afe71302910d0436d313d6e122e045ceb0fc439202bd5e0759e9b6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of a specific URL related to 'vin decoder' indicates a lure for potentially sensitive information or further exploitation. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving the distribution of further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/uplcv?utm_term=1978+trans+am+vin+decoder PDF link annotation
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160842e8c85cc8---89031738795.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/e1191ae6301341ebbe205bd3091d8530/bedag.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b98f88d7c122a305b96496687d280433/jejefarojaki.pdfIn PDF document text
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/6839621373.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607faec9a256d---fijamivizaz.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/xovazejebugutifuxematuse.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7135991b612f7a23b6f9df92287d844c/59213202155.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5d6a919cc---28445963039.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97607031816.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/2ie6q9ah1gucojpikfhdkh47pr/fusaretunowevebopizol.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/dowuwinorupajigazalaf.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/drn7dpvph42lql5mqmvcelc2t2/95866257720.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/27/file/20210527_205114_110.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/921kte3a84anr7qrq02culjba2/21050945011.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7197986303---webolufiwa.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/14875339222.pdfIn PDF document text
    • https://yuss.it/file/55257578388.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/jonujok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 5500 bytes
SHA-256: 2d52528a012722f968f2e8b7ae0dd2ac75aea5c967701925e23d4b6f1bb2d559
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 11132 bytes
SHA-256: 3dc4747242e1090461516abbdb4e3428f0739e2b67648bc7bd2933baae42aea4