Malicious PDF — malware analysis report

Static analysis result for SHA-256 95658fa7b5c9b3db…

MALICIOUS

PDF

87.8 KB Created: 2021-09-20 06:51:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9597fd3e54f078a1c3bdebef09195bec SHA-1: 63341ac240c1de2fb2c5565f02f126e3625831e1 SHA-256: 95658fa7b5c9b3dbcb9a30b471ed73f72ee3afcea386390f0f8c16c14e5db421
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests it leverages compromised WordPress sites. The embedded JavaScript likely facilitates redirection or further malicious activity, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://247christianity.org/fckeditor/userfiles/file/xufisosipigab1631193351.pdf In PDF document text
    • https://learn-atdi.com/uploads/files/jojudegamubajurubajolux.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424e4219cea---tinanimoguzudabosonawozam.pdfIn PDF document text
    • https://wittnebel.dk/file/96053815980.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/xevolowuvakidawapitawivor.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/xevitarif.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/62448070251.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b269f904c4---jewifuvorilolebuta.pdfIn PDF document text
    • http://daiichigroup.net/uploads/news_file/65201077821.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/jimelexipumenosafanibo.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/81382592967.pdfIn PDF document text
    • https://ccskin.com/geektic/files/43252306671.pdfIn PDF document text
    • http://mbfeed.vn/upload/files/1905020154.pdfIn PDF document text
    • https://www.tahitotfaluovodak.hu/ckfinder/userfiles/files/bisumuxilarivoxolet.pdfIn PDF document text
    • http://compagniaviaggi.gattinonimondodivacanze.it/themes/userfiles/files/refovalapibafapoweded.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16140e8ac654dd---tisigezokakexusomitoxaner.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/49865056703.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/20054353908.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614790bf212d8---74885959498.pdfIn PDF document text
    • http://baoveantam.org/upload/files/xiriwupofesuwidef.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/90239803302.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/18349440933.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/bulijogaxogolofuxisiroref.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/79127979221.pdfIn PDF document text
    • https://www.esfa.bg/root/ckfinder/userfiles/files/29855563339.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/sonadosobigupogu.pdfIn PDF document text
    • http://phupmirpol.pl/userfiles/file/lekur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=a+quiet+place+part+2+2021+full+moviePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 18496 bytes
SHA-256: 822874fa848b22353ba5476b91a3f0e82947edf8980a64ab2a5db7d9fa4a0882
font_02_sfnt_off000137a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A5 10956 bytes
SHA-256: c832f2db83d90df8a81edd560a4bfd2f34ff05277cf576d97da08e1c57336a10

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