Malicious PDF — malware analysis report

Static analysis result for SHA-256 36889f670dc16dce…

MALICIOUS

PDF

411.8 KB Created: 2021-06-26 04:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc2985c85c82383fbb10fe39f7cba990 SHA-1: 583422e25639a7a9edb0fa28b79314a2892b68c3 SHA-256: 36889f670dc16dce1584899ce9e307dbdc0d9d37876d18b4ef27a263e40c4f49
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, with one pointing to a compromised WordPress upload directory, suggesting it's used to distribute malicious content. The PDF structure and embedded links indicate a phishing attempt, likely to lure users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9679

Heuristics 5

  • 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.
  • 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://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/8acd11a2b7b24f0035db927716216c66/5163442882.pdf
    • https://aterhesseg.com/up_image/file/32988361302.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe52624c1a---41132783680.pdf
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/38a2ccb253bf202bc8b4b738e58a3794/16852063044.pdf
    • https://masukpt1.com/contents//files/manuwakupupazezonigerenet.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160850a9f161e2---lawidilibuninigixatogu.pdf
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jowapa.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16080e0c2ea210---27701472232.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0be178923---17430234044.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ac221995---84756717600.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/t5a2g0afmfo31i8fus32vjmnat/16807958076.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/08040c098d65661de06d9d4b666ce289/mutemi.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/473373356bec82c2d47c5c12c76dfeae/nezamafif.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/4thv9dv9btkjm9nvqsfp4eu18f/27510873555.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/e8ae1be58e3540448cc071ea69ebe42f/32072971857.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/abe0bc6076d71c847a068bfed499d8e0/63074108673.pdf
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/3993849919.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/085a3a60c88939af2a38ca930e32877b/77885541311.pdf
    • http://beiks.info/public/file/wetorafoxigapatazatejan.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983961ecb82---kuxusabigo.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/62bjof98tftc7rlduluvpc4jk4/99351776638.pdf
    • http://anhbanglaw.com/userfiles/file/ruxolof.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/d55abfc9dfaaeab1d79142b708368493/fovamagupopisate.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4d11fbdc62656c913123d70af43adf3f/8868485180.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99d021a64---82920276701.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdf0888078---90296443612.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=indent+in+business
    • 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_off0005f570.bin
4f0d4b490333d2e57c27a062a51dca526f678aae20b6422228bbb606935c8b24
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F570 25932 bytes
font_01_sfnt_off00063055.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x63055 16792 bytes
font_02_sfnt_off0006486c.bin
1558f6c631ab077fa3f6c9f094a26b412eaa20eda3b9f4566128433b3b61deaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6486C 10004 bytes