Malicious PDF — malware analysis report

Static analysis result for SHA-256 abbaaf15fb50f91f…

MALICIOUS

PDF

87.8 KB Created: 2021-09-21 10:36:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8577393fc7f0c43f2983c46d731e733f SHA-1: 1001b34151c25625a090aa4f242c719123da9f66 SHA-256: abbaaf15fb50f91fc49953443529bab884f1b30a9685da45a6132926c1f5f513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://queure.ru/uplcv?utm_term=rupaul%27s+drag+race+new+episode
    • http://mobilesamara.com/img/files/file/79932819677.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/a7ade641cac08e67ff7afd523858a13d/48237284357.pdf
    • http://szakkepzosiklos.hu/upload/file/73691896499.pdf
    • http://fkm-lux.by/var/upload/file/88197952864.pdf
    • http://prodottoitalia.eu/userfiles/files/golubiseduvosunowotuzama.pdf
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/gozatexuzupazaresi.pdf
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/22311021882.pdf
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/tiwotevez.pdf
    • http://nanouklid.cz/upload/file/27994213101.pdf
    • http://tw-tms.com/uploadpic/xw/files/pegaxolipofan.pdf
    • http://studioguatta.it/userfiles/files/77608229505.pdf
    • http://pjzhengwang.com/upload/file/20210909_033541_176.pdf
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/lozita.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304b250ae7e---kegojukoruvivapumujejon.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134638439d71---21194478328.pdf
    • http://carlaschroyen.com/content_docs/julogefoxofizox.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146e457de562---julisawojivita.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146191eb9915---87236880713.pdf
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/gusaxojapadirujokof.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1613011a68a09e---34443997593.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613056daed6c9---likolibijariru.pdf
    • https://skvely-kup.cz/files/file/4268454266.pdf
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/sibezoponugowasixoru.pdf
    • https://nutstudio.it/userfiles/file/fatetiwulubiwunaj.pdf
    • http://electrogalicia.com/electrogalicia/recursos/archivos/luvuv.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/35103631b2dc932408af0bc555f893fe/28550582020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bf.bin
01b48cca696f2ed9fa3c0ddd310fcdfe1a0af37c928da9e389561392083662ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 17876 bytes
font_01_sfnt_off00011fff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 16792 bytes
font_02_sfnt_off00013816.bin
d89b341d1be0b23d932776f824eda063ed94e0064da3a403cfd94ba6968e89c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x13816 10856 bytes