Malicious PDF — malware analysis report

Static analysis result for SHA-256 0568dd310e70fe30…

MALICIOUS

PDF

84.9 KB Created: 2021-08-15 05:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 58650014ec175b3d77bb6e6fa947c4b5 SHA-1: 1bfdef5902d7df488376fe35d96b29350c67943a SHA-256: 0568dd310e70fe30416b42f3428519e140815b5e37e18c9049dda82dc1368f8e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to exploit user trust through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://yishiweb.com/upfiles/files/20210530_013657.pdf In PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/edcf34b70e4915263c00bb09c8d10761/82370705188.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/xakomakamagibatumozus.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099446083566---97221562809.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/kuwigitovoduvupasonib.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/jomezixej.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f328e5ae2---kizawutadijopematukared.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/72629224738.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/44550570756.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608af98feecba---70074668029.pdfIn PDF document text
    • https://ridersshop.it/file/55966763898.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/vukirelo.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/rurekewi.pdfIn PDF document text
    • http://millecolori.it/images/file/taxitamisezosisitinaku.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/3a509331c50c0cb5c8b95e47009c6aaf/75851948753.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/32438228160.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3115c1665b---gaxidasiredunitanoluv.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/10408282861.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/94065212563.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e560a47bf2c---33538920225.pdfIn PDF document text
    • http://prestopc.it/upload/file/pegopasepevuwudakapaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=bpo+company+profile+sample+pptPDF 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_off0000e9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D0 10808 bytes
SHA-256: 51ac766a2f60d23199a5a6c63bbfdd9065bdc5cc20d4f48c4afcaabcf684e539
font_02_sfnt_off00011ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 16792 bytes
SHA-256: eb906175c8e33bfb6c1d43a5d10c4f7559fe303b5a31c0f9438f3a6ca3c76862

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