Malicious PDF — malware analysis report

Static analysis result for SHA-256 47940046c420684c…

MALICIOUS

PDF

87.1 KB Created: 2021-07-04 20:30:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 103309b1fd6537f4439383c6b72702a1 SHA-1: 7e6a838ebd5f0a5413041f16c2e1d4cff557d74a SHA-256: 47940046c420684c4f3639e6ab9a55e4c919f3f80417a1e2a63ba56887542a19
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URLs likely serve as lures to phishing sites or downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf11801276---98105399332.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a8dc3d71d---lojawigitezus.pdf
    • https://plentis.eu/ckfinder/userfiles/files/55126518237.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0dc2cb8226215ab46d0faf2e83715b12/93895600860.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb35e1f86e---sajelexule.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/91d4ee7c253e88a4f61800e41dac4c0e/dujinaso.pdf
    • http://agrion.org/upload/fichier/56707506772.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1da5bd6836c724e982789b043124a852/48779336107.pdf
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/7dbc22cac5d74e5c21090984a1d1c3d4/jinitavizat.pdf
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/50860514650.pdf
    • http://kapelski.pl/userfiles/file/rilej.pdf
    • http://cherryontop.pl/upload/fotki/file/gulas.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b24b73320---39059462087.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/3b1016eb0adf1f847d26f37300007001/76461225132.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e5e58186ee2c1bdf1e3bac04eab0e75d/76359364735.pdf
    • http://alkanboya.com/files/file///zojakadidixi.pdf
    • http://fotostudiovaccari.it/userfiles/files/senaninaruleg.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/7239537073.pdf
    • http://banglatalkies.com/dynamic-images/cms/file/daxuwuronumijorobotoxul.pdf
    • http://dkmmotor.com/files/userfiles/file/zigub.pdf
    • http://abwninemile.com/uploads/files/tiwogubeparavezi.pdf
    • http://enjoybowlramenandpoke.com/uploads/files/11381384436.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/6hp4nemjhlhg84qgd6cs1gkmm3/78232049417.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+get+contacts+out+with+long+nails
    • 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_off0000f2c6.bin
e13c85cec5ac11b4dd9babc353dc0911db61620baeffe360ab9babdcb332c32c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 10588 bytes
font_01_sfnt_off00010af2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 16792 bytes
font_02_sfnt_off00012304.bin
5ff82ecb03eceeb36d531decf52e85280c6816e0890184020f092e176a2d6873
pdf-font-stream PDF embedded font (sfnt) at offset 0x12304 17072 bytes