Malicious PDF — malware analysis report

Static analysis result for SHA-256 563b011b34e5114c…

MALICIOUS

PDF

108.6 KB Created: 2021-06-30 21:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1b99935ab139516feacb4e0031e91446 SHA-1: 3befe51494ba3554e491bc4ccb61ecdd48c7bc20 SHA-256: 563b011b34e5114c2823f684d71b19d157451dce19f5c88132e7cd2561a25a76
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to lure users into downloading further malicious content or visiting phishing sites. The presence of a 'download button' heuristic further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://perles-del-beya.com/userfiles/file/73799318533.pdf In PDF document text
    • https://anthonygillant.com/userfiles/file/fajinewitogomipapaz.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf70be2efb---gamizofewofav.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/60491221810.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b8ceec18---zanobug.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/77426571450.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704666c4c81---66762668272.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160779a23d76de---69129206493.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/42811891008.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b8941e705---xisezipowizajoz.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jebisevufovifatalo.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/sativipibajizamad.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/nubawozos.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fa19f2029---nesevemifatezebora.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/qc9nu7r61ccttggcerepdel7u6/sotimofaposegekobid.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/05ef2a558c7607327d1534640ba4dc2e/97376005415.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/310b6d863782d3ce5c21927f49a9560c/7077952865.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b59048b60b4---80079205350.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf48f07a4---sufiz.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608216be39f21---korobafedijamotarur.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb7b8c7212---76707621254.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/25c7711a1a09cfa25e184fa33b944e5d/19873096032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=2020+jee+mains+question+paper+with+solutionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12763 11124 bytes
SHA-256: 14af26a3bbc89ee74ee0f0923ed1912275223b9d2aede711e27b4ee253e99232
font_01_sfnt_off00014130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14130 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15942 19572 bytes
SHA-256: 8461799e4cd26b0dbffcf8db0f44345dbd301fd963b5762c68b4f43a55987055
font_03_sfnt_off00018dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DC4 16092 bytes
SHA-256: a37c6052708a11292b84d6ddbd984f933181f63e6b3fea8565785f9b56dba974