Malicious PDF — malware analysis report

Static analysis result for SHA-256 97889aac08f666ec…

MALICIOUS

PDF

95.6 KB Created: 2021-07-21 01:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e1ccb84c2c0e4a28b5b63c8abd3f56c7 SHA-1: bc712a5c2928ce986e43cd3bd7fcacb8533ddd16 SHA-256: 97889aac08f666ecc437c5d2be38e63ca1409fd1ad8af4c2776a910f411e661b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to numerous distinct hosts, many of which are compromised WordPress sites or disposable hosting. This structure is characteristic of phishing or malware distribution campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://apcmagon.com/userfiles/siverakovimasidujixapi.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac70d545fbd---17548360225.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/41999330604.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/27c62bed67a7322563e2315aa72687a4/47763723935.pdfIn PDF document text
    • http://ahdjcm.com/upload/files/70113022956.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16078efcf03d31---80393058606.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9aa5ca090c---18482804215.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0c66d4292f8826617ae237016b4f5ed6/weperawilabidakolamowapep.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079e12809ebe---94091338601.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5caa64004---gexigesab.pdfIn PDF document text
    • http://sakem.org/userfiles/files/dorovepatuwezokoxetosipe.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/136d57c65a245297f904ce65676cc3c6/84853277349.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/61304feede54c1e4c98f2884565ce7ba/7895383366.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b139aa003c0---zoroxozafezafuwozina.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/rsifd721g1q1kc5gbe0nnfd2j8/pikozowuvatimaxomuvibe.pdfIn PDF document text
    • http://fkhd.cz/data/img/13866283910.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160753bbf26db6---86095924587.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/18494387545.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/0cdf9806ac90520d205f63a9d7fab004/xuwemorebokejiker.pdfIn PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/60879019830.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/71079948557.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/16ab6bd7731daa4bc00b34d985f83eff/14347644482.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/99228033542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=baked+chicken+easy+healthyPDF link annotation
    • 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_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 18040 bytes
SHA-256: 534fb180579f18cd3ffeb4823a633c9db580bdd6dd481e5c2c83135fa5eb68ba
font_01_sfnt_off0001401f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1401F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15836 10504 bytes
SHA-256: 54c979749ebe50a1b3f8198ef8f3b0d81b411d3ac450cb92a639245ec6b20a15

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