Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fa850dc0f23d1c…

MALICIOUS

PDF

72.2 KB Created: 2021-06-27 22:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fe9daa05dfa6d5e9c18325319f3999c SHA-1: 226def16877703d2e67560c3a7c425bc17a68950 SHA-256: 60fa850dc0f23d1c8b3614df5c47a36eb97de955a650e9a7c04a57b20b5d3b16
244 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics suggest the document attempts to bypass security software and lure users with a password-protected archive or download, common tactics for malware delivery. The numerous links hosted on disposable domains further support a malicious campaign aimed at distributing further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://murito.fr/ckfinder/userfiles/files/66876197155.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/09bc0ae3afc72e501ba2fd675fea79a2/83353071929.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/6a48d46be4272955a16fc81b3ad8c790/juzut.pdf
    • http://jfac.kr/ckfinder/userfiles/files/lebanubofederaseg.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/da3b365930d3a9e00bfe901ea39e1756/widinulimusupimav.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5022035d2d74abd15d896145681b4833/vivotudoribezenadudeveko.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/xenoragodanatulunoros.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/bnqjaaiefihms7k0r2tidi66hj/93983721257.pdf
    • https://carrieres-pierre.com/userfiles/file/45484573541.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c347389069---7717260453.pdf
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/f04ean7m6gtsd4ddbhbb3kcc3h/83695646223.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/84601884248.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/fc32aa1aa2b0f272e57ede2a49038bb7/wodozozazinamuxawenoful.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/ab50c367f6c084a71fd82f9093dead2c/bekufuna.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6614e48a3b5e27de54259f852cf17b24/7512480973.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160722fc8da609---zunoxikadijajuked.pdf
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070128d8d7ab---26258868048.pdf
    • http://zulassung4you.de/bilder/file/fazedofa.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16081815912b92---84820768337.pdf
    • http://hayatteknoloji.com/webimage/file/tilevepodedugosebazu.pdf
    • https://weeb.nu/userfiles/file/22404204522.pdf
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f8ac92c5---19511415489.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=injector+csgo+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_off0000b854.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB854 16792 bytes
font_01_sfnt_off0000d06b.bin
64537d416e35077eb8ca185c668b103886861be2eafcaeab183c2ffeaa8c546f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD06B 10620 bytes
font_02_sfnt_off0000e8bf.bin
8d1e00d32c586335d039a3a631da43f0a228f41228c51132f32ee624144968c7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 16572 bytes