Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee71d6722a05359…

MALICIOUS

PDF

86.0 KB Created: 2021-07-19 20:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 49b273d352e81a8e43df2b16fbc70ea1 SHA-1: 026959f0649ea89474ae4d9087a10e4c4d2dda74 SHA-256: 8ee71d6722a053590e7e9b812e19afa4093c7716932f396bb651c50ac88d19a9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the 'password-protected archive lure' heuristic suggest a phishing or social engineering attack aimed at delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbf98ee88c---54303641886.pdf In PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/60957397460.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/82b309cb884a096ae1f8c83eeba60400/wupolemidabewekelis.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/94535623761.pdfIn PDF document text
    • http://someteme.com/archivos/_20210620103834.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778fae80366---xokexokasifakalav.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/dad4eefdc4b63bb7429258f4b34f995e/42023238191.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/aq67h8khn91m8ndrfhehbtvm0l/7037864549.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a435a63cdbb---56929088599.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b0831cec7---dumiteginififamole.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/bokatiwe.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b906d3cc3c4---gefogesumirodagofoza.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3c7267b32---86412415665.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/a0c802d2ee6c29391167fd4d6f36c3b6/47928971618.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebcd2ea62d---xenosobobuxugimuze.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/xuwapodi.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090244e4f209---femuporujodawavokepafusof.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/2j6tn439rq2ig9o3rvtsdapfof/66350597405.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/walotam.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b201656e8c---78923823350.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/vipudinemusupezavufetuxid.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160757e42bd983---kemamibomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=free+floral+svg+cut+filesPDF 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_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 10552 bytes
SHA-256: 91203c418276119a9dab499d3c6887a313f690d2b09d9d8b84d8fc570bc86998
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 18076 bytes
SHA-256: 40a2406134bca67b37d1df1ef8cbfcfa9faae238eecc45e2517a4305cd95a833
font_02_sfnt_off000132f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1