Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b2a59537fed8b3…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 19:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 6c28660ff7a7e0ed47ffc6d386d3448b SHA-1: 5ab596c350b47bcc070a9b76f864bcd0f198f1c1 SHA-256: 34b2a59537fed8b360748b44b3967233a8fe397e14b1f55afcc7b953df18ceb0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

The sample is a PDF document that exhibits characteristics of a phishing lure, indicated by the presence of numerous external URLs and a heuristic flagging it as a link farm. A critical heuristic identified a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste content into a command-line interface, likely to execute a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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
  • 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://oniceh.ru/uplcv?utm_term=ayurvedic+treatment+for+acanthosis+nigricans PDF link annotation
    • http://yossy.biz/userfiles/file/weduvuzomitumunuleledu.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/77566085527.pdfIn PDF document text
    • http://0048.pl/48files/file/tajogumel.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0b238a041bdef01d4d0d0315c2969e9f/noveje.pdfIn PDF document text
    • http://teifsepahan.com/files/file/rumuxerira.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/80810722636.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/nozuwolovebawotobuv.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/8a800e1f79269b80c0a18edbe7bfb6f0/juwojejiv.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/8629624823.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/7fd1dda6dc25f0c0f5ed9cd1e1d82c11/77214959116.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/dc99925921d6ff7da00ee02523fd1b69/47839239123.pdfIn PDF document text
    • http://dothi.info/images/files/daroxakeronagigo.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089bba37d6fa---xenaguvitemomokawama.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/27123413201.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/1177b879941485fc6a61fd09de3b8c19/vowifosu.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pu3sqgs6jpu21c6o6q4vd20a74/55243001612.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/wedusisijapodewovux.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jq2dkjn6sf7de9ji8pm9kthd36/11505578712.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/89361193888.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/gesirixibolikuke.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160901582622a7---mokasajetune.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/b0df92f35c785156ccc8e05079448194/nipotedoboxelolitulek.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/4cfabb6abd21c1a288a41c28f0270940/78213826021.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/vaniwikuvovuji.pdfIn PDF document text
    • 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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 19408 bytes
SHA-256: 91f1184106d54ece6732e52eabff72d688c1239026a623e5473e832e5508b8e9
font_01_sfnt_off00011cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF9 11140 bytes
SHA-256: 86b48325c7b32f7bbacf40a11cf8ee956a693fe43b2b01dc5ae6096e03ff7f72
font_02_sfnt_off000136ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.