Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7d31566cddf4f7…

MALICIOUS

PDF

84.2 KB Created: 2021-07-24 05:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8f0def12f24f208503918763b8a06717 SHA-1: 05513fbd08cb158589c4e388a92dfc01d4486d16 SHA-256: 0b7d31566cddf4f77a6da3a49031a4df6c17a74b16cac00c3793f326d6d6b134
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to host further malicious content or phishing pages. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/4gfop2ermkp2rahupoptveahk3/najefawataxo.pdf In PDF document text
    • https://tanasiri.com/piceditor/file/47883363958.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/pekagikasununabufinidutak.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/gegofabapogazexegapuzaw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb5a78754ba---59312680097.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/fudopodofuvuworijesug.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/8o6dkvlgpg8lv7mlv6l6mpse4k/vazedo.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cnvaellt4d01m85icvlp5klnqo/27188870144.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/zuxageruxizi.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/59871670747.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb279d6cf29---lixapune.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/96653612972.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861119417a9---90188442799.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/63574454877.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/2d3e2a54d22f06a2da0822dea2d0f1ef/13676018610.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/89929447671.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/jovuwexipe.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/36014189638.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/1142639288.pdfIn PDF document text
    • http://proxima-design.cz/files/file/44887860164.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca16bee3f5---29284724921.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=simple+flower+drawing+imagesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 16428 bytes
SHA-256: 90f85808aae095477542efd4a19e1422af102dec9e2b78e7a54c84ad0643c98a
font_01_sfnt_off00011205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11205 10904 bytes
SHA-256: 052f42ac3900549e67c303c3c7fed7302b3840675537d7beef30e549ea40ac35
font_02_sfnt_off00012b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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