Malicious PDF — malware analysis report

Static analysis result for SHA-256 0adae4d2280aab8f…

MALICIOUS

PDF

96.6 KB Created: 2021-08-05 13:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 5ae748efa2139d978cb5e41bc4377f21 SHA-1: 41f18d71908fe9679c112e97f32ce770a0684f32 SHA-256: 0adae4d2280aab8f02a0994e3d19f2906a46d81f6ec43d89ad6ad95b4e701d77
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious content or exploit vulnerabilities on linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://infrive.ru/uplcv?utm_term=how+to+hack+diablo+3+items PDF link annotation
    • http://carrozzeriardue.it/userfiles/files/23837567582.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/guxavugazilevesuxukonun.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7389f657---tetunixa.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/70fa04824f0e7cd2f0cada9daf34bab3/4622025859.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082df52b0507---xuvakijilapironesudazan.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7e8d556aa8c5251dd491b09e1fcb25a5/jatukidiguzamibimaf.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/2a9bfda5063cff8bfa448ada70faeb15/tiwakozanaponolinivop.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/jasotowisef.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/sinalevax.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8a160d15a47f4f3c1345fd54d4cbe17f/51995639057.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084049e68bf7---nakiponadavorizufupe.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/335d1289a5967193179927847557db44/gizugug.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b701dbc728a---rupaleb.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/vefafuxepivalubizusarup.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0ba319129898e69b0b2efa777bb85cfa/88803792932.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/78381525573.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160be84fe37a60---12102652659.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/33492807768.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/meguvajinowore.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/67931951099.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/81906735086.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/20995747802.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e99pdc4smtgqts9on1kj9rpk62/gumiwavevafekewefiv.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e5bcb3034---36055287232.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/kudumakikajalorutirix.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/jonafugejavutikuronoxeme.pdfIn PDF document text
    • 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_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296E 19120 bytes
SHA-256: 87e25010fff0cd8865520a4e95b793dbdee9a3b80526c4257ed15d8aa94646f7
font_02_sfnt_off000159f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F1 10912 bytes
SHA-256: 33f124bfe9d7a201cfb9f2efc1a11b5b1d6a5fb1be42b20a8b62b717c537462d

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