Malicious PDF — malware analysis report

Static analysis result for SHA-256 c18411cef43ff97c…

MALICIOUS

PDF

84.0 KB Created: 2021-09-19 19:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0aca0076c940997f4000b093bb2ef53b SHA-1: 85b39f215f44e4c3e0acc8b0e0fda1bdf12525af SHA-256: c18411cef43ff97c0154fd2ee1ce475d7e0513a9450dfb6876014066d42a4ba6
216 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress instances, suggesting a phishing or malware distribution campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common tactic for executing downloaded payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=premam+movie+torrent+download
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138e121b32eb---2492598134.pdf
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/sidesuradasuwamekokaw.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/70e85236ce63584022ead8321a3387bf/35162958580.pdf
    • http://playitdirect.ca/ckfinder/uploadfiles/files/69520333427.pdf
    • http://adimhukuk.com/resimler/files/bujujawamipubalo.pdf
    • http://140.121.125.49/ckfinder/userfiles/files/20210910_160015.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140e3dc15421---25330961556.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/30364530175.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea30e9856---87945333458.pdf
    • http://avtosfera28.ru/userfiles/file/kowisajerobojumosojubu.pdf
    • http://heatexchangersolution.com/upload_fck/file/2021-9-18/20210918185148279318.pdf
    • http://seosanhrd.com/userfiles/file/24356327650.pdf
    • https://moiatakashta.com/userfiles/file/18332689701.pdf
    • https://cherrychile.cl/cherry/uploads/contenido/files/liwap.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323fdbaee34---9827685842.pdf
    • https://truonggiangcompany.com/userfiles/file/4776468721.pdf
    • http://beverly.kopanramen.com/uploads/files/8192850765.pdf
    • https://isleo.com/i_photos/file/85001313350.pdf
    • http://cesurmakina.com/userfiles/file/xoverimurewawadanexesuf.pdf
    • http://liburnia.pl/userfiles/file/19772392828.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/ffa16914635d9b0591ede0e948e3cdad/60410823370.pdf
    • http://kazuma.ru/ckfinder/userfiles/files/57865143061.pdf
    • http://whkmradio.com/userfiles/file/66013122179.pdf
    • https://rmp-familienanzeigen.de/cms/files/27589889397.pdf
    • http://bajajsports.com/userfiles/file/27216063161.pdf
    • http://zekejozsef.eu/FCKfeltoltott/file/soviwuzo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e302.bin
3694eaf449f368d9c57a0b96b1531dd6dc39ef4083d007318f17ad4625713269
pdf-font-stream PDF embedded font (sfnt) at offset 0xE302 18412 bytes
font_01_sfnt_off0001125b.bin
823fd053941a8405968deef786fa3886ddcdeb87f41d93e857f04f01b0cfeec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 10392 bytes
font_02_sfnt_off000129de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129DE 16792 bytes