Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41ce507562d2bca…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 20:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 89c96d26215b447b9fa9cff3f8d1e33f SHA-1: c7aafaff782910201a1ad9153a233a876964c9b6 SHA-256: a41ce507562d2bca1c487c5b5aa61ebb4f2cf0ef4a6d04452d0ab7db9dab194e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the structure and heuristics suggest it's designed to exploit PDF vulnerabilities or trick users into downloading further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://davidhammerstein.org/ckfinder/userfiles/files/mewoxekevivunijomibusax.pdf In PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/62914373457.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0dd537c32---tupam.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/38807591222.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/tubamiputofifetefewaneti.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140d54ed2474---67250373712.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/79326872391.pdfIn PDF document text
    • http://th-hl.com///upload/files/nosasoralamitavivin.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/zokikigamekowofikirujol.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/20928603573.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/zufuxapivulozakolemap.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/dizejawakadelewerijab.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93119092225.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/dibejuxipilap.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/19684600539.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/gafezo.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/75305117592.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/91922530036.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021090615103473499.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/6990846115.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/34156478327.pdfIn PDF document text
    • http://wxhsbl.com/ckfinder/userfiles/files/20210905_082609.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/kegiferilesivi.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613a721d2df78---58324004852.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/vivojekijimujakujar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=ardaas+karaan+movie+downloadPDF 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_off0000e889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE889 10536 bytes
SHA-256: da79e5c224619cccabf5c5cf6dad0da8c28948f89bd750a912be9c7bd942ee6f
font_01_sfnt_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 17256 bytes
SHA-256: d9aeaf0544cc1c3ffb5eb4ebbb28801bf32649e8a28c0ad67c683fd177c2f49c
font_02_sfnt_off00012d4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.