Malicious PDF — malware analysis report

Static analysis result for SHA-256 9448fbea1fe9feae…

MALICIOUS

PDF

87.1 KB Created: 2021-07-14 07:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7dd55e9976c78a8d0fe629b95f870d2 SHA-1: 0d59bbd35071b5cac5dc866f60762090eab07836 SHA-256: 9448fbea1fe9feaedcaa132d5c634256248e26bcec67b742ddcc40b8b52b7353
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line context, a common technique for executing malicious code. The presence of numerous URLs, many hosted on compromised or disposable domains, suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://terminsk.by/pics/files/84112489786.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/fbb3b4c6c097629982f5d322e35d3b08/sofibiwaxu.pdf
    • http://beautybybelief.com/admin/images/file/35384366490.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ff7e4908---vipideduzozotukuwa.pdf
    • https://corghialberti.it/file/zuxilavubefisuwa.pdf
    • https://faktxeber.com/resimler/files/bakiwonumowuni.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/31412298764.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093af8e6a0b0---runuxisibejezojoleva.pdf
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/daxowedubalit.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/49c58648b80ca14d7038bd4c9f38c4c9/96445396732.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160781919e88d9---51684589567.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160782a5704a29---fepavunavifufowimexo.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b29fca654---50693663098.pdf
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/39e4dd6ab17b6e26e7f439c3d7da0999/godidewuboraraxotaw.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/da8949e889e7e3a2d1b47799d3821321/11997731308.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/7lp5ht3nclcu0ibskor5jr4f0g/rupidubujawid.pdf
    • https://contactfm.be/userfiles/files/gedagepadog.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a452645f757---zerapuwino.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/40822650034.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cc3ebe95d---52543570378.pdf
    • https://tselectromechanical.com/uploads/CKfiles/files/81933222059.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/89495845220.pdf
    • http://handsonmontessoripk.com/userfiles/files/duzinap.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/05c0173892b891a30ae70f5d8e4f04de/97106953997.pdf
    • https://angkoronetour.com/userfiles/file/wutejuledeso.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092994dc233a---91208655605.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=hiren+boot+iso+free+download
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 16792 bytes
font_01_sfnt_off000108ed.bin
3cde4a9ccba7a89c2f3b3fde5f1b2d60cc1118218954b9b17835ab094920c1df
pdf-font-stream PDF embedded font (sfnt) at offset 0x108ED 10564 bytes
font_02_sfnt_off00012124.bin
b32e3faa55be31ab7aa998dd926a71d06555d151e32dcf29eddd19341c8755bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x12124 16976 bytes