Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f06b00ef1d99262…

MALICIOUS

PDF

155.3 KB Created: 2021-06-29 11:10:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e12170bcf722bbff535be4145aceebe SHA-1: f47206408bf32bd4360432f7460990ec541168fd SHA-256: 6f06b00ef1d99262c739f80a7ce2f55b1ddf1327c5cf39fea6855640ca48829e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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://philabc.ru/uplcv?utm_term=language+of+thought+hypothesis
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098321ccc680---xekuzizarujixuvazoxobi.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vobmcgas82djcc09brc0shpt07/tuzodivekivegojaxevap.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4c0ec5ce90cd0ea3be47561589bfd40a/79256698919.pdf
    • http://enricobarraco.com/files/nezorotumipogiridamezowo.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/dr0i2k1frriqodh4u6o0ogcq95/2955754169.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/eo8065l0ldjdi0qcv8litb2li5/10305010006.pdf
    • http://mikomisushiwc.com/uploads/files/12675554728.pdf
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/63668696050.pdf
    • https://e-uchebnici.com/img/file/kofisoraveronas.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/2ltmquhjmrc9s7p7i5m7m0ajl7/2967923018.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/dc02bbf790d393721256880433726a0d/sobafuzezibemujesuraguj.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609485257002b---zotonegujexajebi.pdf
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/73896972735.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/irlnprrdf5va8c0kar8ot6d676/nadeweruvawagumowetaz.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce9c1ada54---44786545868.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ea0f479a4---mimonepivebofazadiv.pdf
    • http://imaginove.eu/data/Files/letokugirijazonej.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160857ea164f01---kumoxivaxav.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098468b28333---razuwuv.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16092d7adad178---25470307402.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/20379049298.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08068e42a3---gugidisejavisawowe.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b778bdc0db6---84766719321.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608172b419f26---47558992026.pdf
    • http://nfrostov.ru/upload/files/sunozozizosat.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e678.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E678 16792 bytes
font_01_sfnt_off0001fe8f.bin
18a0f2a758818ebc42debc443b6d29402e42016fe6e4e1fb6299e1e45c2e0cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE8F 10664 bytes
font_02_sfnt_off000216f9.bin
e5c2006e55ad625cb0e330525642bf09b2c1060b53ecf389be20fc51fcbb2143		 pdf-font-stream PDF embedded font (sfnt) at offset 0x216F9 18856 bytes
font_03_sfnt_off0002484a.bin
dae5038d748b2b7d89173d83a61ff0ceefc2856cc76f3bb6f5837745f88f8889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2484A 16084 bytes

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