Malicious PDF — malware analysis report

Static analysis result for SHA-256 644dad6298fd1e42…

MALICIOUS

PDF

80.4 KB Created: 2021-07-03 13:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2bdd4f50e4ccc025326b5b75cd3a2da SHA-1: 6d80c0342ba5c7d9a147c3ba89c3d40ab1927e48 SHA-256: 644dad6298fd1e422945d5ce84fc49ce89ff8c36700b80d3f0df664e2d7a4aeb
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute further malware. The presence of a visual download button lure reinforces the phishing or scam nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 https://inwebjor.ru/uplcv?utm_term=made+in+abyss+dawn+of+the+deep+soul+full+movie+download
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/8f6ee3898c5e0a3a44b1b4b18725b062/felerazikekirijotosufi.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b86387457cd---paduxifozazinis.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab266cac5---xajonurexuvomixin.pdf
    • http://camberwelltaxi.com/survey/userfiles/files/gefoxaneg.pdf
    • http://indel.sk/userfiles/file/64862589054.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b06a7051f5c---31652920524.pdf
    • http://ipost.mn/ckfinder/userfiles/files/2432495116.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/humnk6v7cjs37ptfeve3bnhri4/basumekobokiloda.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f06fce604---daxobararobigivuzajawu.pdf
    • http://lowdertraviscoats.com/clients/7/74/74ec8bd2877f4db8d0b9f56bae0111c3/File/73294910106.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/ca9eab74bc9ffcb9e50f880d9e30afb8/18381636088.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c99682b5c1b---40037763262.pdf
    • http://www.anjhimayath.com/upload/file/gubukobam.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/23812537666.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ece1a0c03---gowafotale.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/28fc3c736ca8305da4fc1a5191e02b94/64807599508.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea5275b29a---67116970598.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b195d1aff1---nifajuwalaz.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/o00tbf5hjop8l6cojvftpo2hj7/44527831803.pdf
    • https://juhaszautovill.hu/userfiles/file/43587028939.pdf
    • http://backkwang.com/userData/board/file/bufizoguwojed.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/92118388136.pdf
    • http://inwallendorf.de/userfiles/file/kolodebomukibo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c477.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC477 16792 bytes
font_01_sfnt_off0000dc8e.bin
06ca9765acd4efc45496e09ae7abe6a42743fb2b51dae3e94508026e2298d472
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8E 11160 bytes
font_02_sfnt_off0000f644.bin
eaf21dafa563211f2d07d5d9b64f2de37f516ad778bf02b0c813fe48a4957af3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 16940 bytes
font_03_sfnt_off00012287.bin
705b44036ac4c50d1b85821a02e53f1d7107d6bc09d305bf4b153e947e7b252d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12287 4416 bytes