Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aafa36eee84a270…

MALICIOUS

PDF

87.5 KB Created: 2021-07-05 16:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df4ae736c67f35e5a01eedb671057583 SHA-1: e2181faa0c77f9d9c9ba191e3150cc43e60646de SHA-256: 0aafa36eee84a270bd3d60b155e8b3701ea1e0a511cf4eef522bddf476acb456
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings clearly point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/abeb4963b4e6cc634e5af6b5f1f93912/lojatugu.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1e2a65478---1477997337.pdf
    • http://asea-admin.com/_userfiles/file/20210501191712.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3259f1390---4910060392.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/volupu.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/7e9a1f42a73fe256bb4499b6f17723f0/jitatotebawipi.pdf
    • http://xahscw.com/userfiles/file/sidajijolovezebebamun.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/555f5750f69d5d93439dc08f1a894e3f/tagagenedijujotinabuf.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/2qkj4df3fg8a4v57dged028mna/tonorura.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/t9effujt11oeeqqgatghe5gcn1/debudebemela.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7672cde03---24246206771.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/r534adeijn706eaej8jtnhngk3/71450681882.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/9c225f1eec0a6b5223d0e318d15480e2/45279221041.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/e56d788ea2e1a6127b5f8930b07424a3/nasoximilebidafa.pdf
    • http://homenet-spb.ru/userfiles/file/70324242390.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fc4fe2327---gofawakeke.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a3f34de33ea98738d403c6bc87f5eab1/32760703742.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/70254412427.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2875323a30---paparapozive.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608589d59ee8f---34815236475.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074838497a24---8361725932.pdf
    • http://weberstellen.ch/userfiles/file/pajoxireze.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608979d1c2a91---87577788798.pdf
    • http://hrt-foto.hu/_user/file/rizadopupudibob.pdf
    • https://anukulagrotech.com/userfiles/file/dipitunadexidowalezu.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/nowivuzez.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=french+onion+mac+and+cheese
    • 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_off0000f3da.bin
cef0c4f581356f8b0552472facba6e17bd28c0a830235be15a8a9ed5b04a096c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 17396 bytes
font_01_sfnt_off000120db.bin
204cfa711cb965ef67f5a6e684d0078f2429273fd8840b2ee5a1f614a99dc13b
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 10468 bytes
font_02_sfnt_off0001385c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1385C 16792 bytes