Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3acf244f00a3800…

MALICIOUS

PDF

87.9 KB Created: 2021-06-28 22:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56bcd11f6cc5ca83f219d8f5a55aa50f SHA-1: 7e9c2793bbe0c847045d455555ca3ee85adc8055 SHA-256: f3acf244f00a38009d77526624e8b0346b39f8f9abc7a70d80dfe0cc8cb5a330
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are designed to lure users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607fce6dcdbd3---garamivojodipugalemebesa.pdf
    • http://diagnosticaedilizia.com/userfiles/files/58466183074.pdf
    • http://jocoseatee.com/userfiles/files/jafogi.pdf
    • http://varosom.hu/userfiles/files/55438337310.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b031cf0bd8a---duxanogalavawutanuxetos.pdf
    • https://barcelonacentremedic.cat/files/galeria/files/voxafaribowujuronetinivop.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f19069f4b3---1060736642.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/291592331ea275c06883d19a3cf879b3/getasedovu.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/736c3a3b9489844e7ac884976d885d91/40620211403.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/vs3eqm832jgvd3ineeue44u9r7/witudarejoravonev.pdf
    • http://panziofabian.hu/fck_kepek/bubopopezaki.pdf
    • http://demkapi.com/resimler/files/lasefoxijupaputapez.pdf
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/54028866389.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/26305521926.pdf
    • https://abugfreemind.com/userfiles/file/likenufevipedifafoxugigo.pdf
    • https://viessmannboilers.ca/fck_upload/file/3209924390.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b7d7cca9b09249f26f7faa465040d062/fevelekipidiva.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/jepgv6pqudp03lvqtfdvi3qutm/kimurorufetojipetoju.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3feb6835b1---zegilorisopu.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609280d529753---xibepogexinuvofebuben.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/920a0a7182a83c0cf851e51233c957be/15036560300.pdf
    • https://noihoithanhtuan.com/media/ftp/file/10518217350.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851c01a9726---62960566156.pdf
    • http://acecaalcoy.com/userfiles/file/83938673604.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/82a4e61c9161c06d8d5c5093e09e4c95/3567714567.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=fastest+way+to+gear+up+in+bfa
    • 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_off0000f4ad.bin
7041f97306013b6624cd9a93fe08191f2b4e06da8f912eca4eefa4a745cd8509
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AD 10904 bytes
font_01_sfnt_off00010de8.bin
dc2e5a5b94647ab7d1a1b37dbeee4a65e853d2a8d27f534273974ca5e2b3653a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 17068 bytes
font_02_sfnt_off00013a41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A41 16792 bytes