Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbc32b2bc32747d…

MALICIOUS

PDF

74.0 KB Created: 2021-07-02 05:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e53a0f326fc85afa122573f825f89bdb SHA-1: 2126eb8e9780517e46ab13f6f6211f39a39900a5 SHA-256: fdbc32b2bc32747d107df0b310c07ec662e276463bf4c31f81dbd07af0c7d653
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d865617af1a---20630671692.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/68ce09d31f561c6a76fcd1d7ed5d3823/benonugerafoso.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffac991fc9---nozomijebukelepe.pdf
    • http://smit-electronic.hr/upload/datoteke/zosenesazoket.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/97c7184e5fde0cdc94ecccd800bc30d8/vopelusajerarupobudo.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39a244763---23608778633.pdf
    • http://hyosangjo.com/userfiles/file/20210622191049.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608294f31cf43---49339817677.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/bcbb862081c7d58ccad640391f808daa/6381757840.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070085613bb4---kinumuvowisugijek.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/1bea6c00166055ead8cd21b2db7d431c/89933805505.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e554f86a95effcb7160b9cdf503f1dd6/7164390907.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/3a5501cd7e166ed4012c35fd3f0fc776/kumubogoguzupu.pdf
    • http://ahrestygz.com/userfiles/files/20210620_051054.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16200791827978.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609887721e4ee---63716950574.pdf
    • http://ck-kutnahora.cz/gais/image/file/98828248305.pdf
    • https://europartner2.pl/uploads/93334563305.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2a71c6121---38660016931.pdf
    • http://drive4smilesquebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/gaguv.pdf
    • http://hieuchuan.com/upload/files/jusaxisiwerudegivuje.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160802f5af2264---kajewizipijofav.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=no+significant+abnormality+detected+meaning
    • 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_off0000bd81.bin
44e7d6e484428bf704d3bef00f8fbd342d6e0bfdbce42da3c541b036041fa1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD81 11048 bytes
font_01_sfnt_off0000d716.bin
d537302a78bd70913313f238a9ccb2047ad9a30faa8599002850397eae20d3a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 16908 bytes
font_02_sfnt_off0001029f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 16792 bytes