Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46f9f0113a9a18c…

MALICIOUS

PDF

88.5 KB Created: 2021-07-03 10:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8281c6265060acb707a46832dd8c62c SHA-1: dce8b216d1cae24eea514bef56f138dbbda66c24 SHA-256: d46f9f0113a9a18c7eec189a75414b7b37630afdb914742eeb1b2fed021188fe
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of these links and the nature of the detection strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/098071a41eefa15da1983714925d4589/51122786232.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d01c1b3a560---94920357191.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/n3n46i5fj8n4ghejcs41counb8/7197192917.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3221902fa5---78674234682.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ce862e8ae---laboxozedava.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/ca2d7ad98aa3a037846ddbdbde96374c/piruwibep.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf30e6e021---43862898106.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/laju5g1uq43c3qkpu8l927gaq4/duxifomige.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/s22lgod4kpkkn81vus0nt3vlr5/vitikasezuvoxazalo.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0853b25d92---42586409825.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/5ncfgi3uerqgikk7r872t0bctn/33429741152.pdf
    • http://richardchong.com/userfiles/files/7744657084.pdf
    • http://berallebags.com/UploadFiles/FCKeditor/20210630125410.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ea1b84dd2---39803050661.pdf
    • https://motelandratecuci.ro/userfiles/file/47260277833.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/15ltoqud5g04gmdr29si29m645/vivasinanepatumozogi.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/b96e2e88a6a8098da959ac063d80a8df/vupatoruw.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-21/20210521001205723463.pdf
    • http://lmyc.net/clients/875386/File/49920502344.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ff43d8572e692046a394748d347178c7/lemugoxebolokutom.pdf
    • https://rybczewice.pl/userfiles/file/mudawumen.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/4609860751.pdf
    • http://sity-luxe.ru/userfiles/file/wesugorelalinitabutepaput.pdf
    • https://stayatrosetta.com/wp-content/plugins/super-forms/uploads/php/files/455f2uu7t7ng5l4rj5vkb1fvtk/bazowazexa.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a643bd45eab---5014239766.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=angel+and+devil+halloween+costume+ideas
    • 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_off0000f30b.bin
c23715c69a5a58baea863e8356072637c491c607af00a415995d00b0cc676c7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 17728 bytes
font_01_sfnt_off00012139.bin
106caa3f96b0d5c1471db26c3491c55d2460f6ea78acc181160c482d1ae09885
pdf-font-stream PDF embedded font (sfnt) at offset 0x12139 10948 bytes
font_02_sfnt_off00013a4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4E 16792 bytes