Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7be5fbf63a5cc54…

MALICIOUS

PDF

79.1 KB Created: 2021-06-19 21:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebb98821058796e2752e5795d93b6af7 SHA-1: 7c0aaa5ee0f60e34772d3193195137d429fdc12c SHA-256: d7be5fbf63a5cc544556aa893d80a4e5661dd63c1df01fa5166e00f20ebad219
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's designed to redirect users to potentially harmful content. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b33755b678a---vezipalibexagutivalidu.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/e02482c924e159579cfc7f93eb2129fb/gujikejewuda.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c3a6a94b0---ruvupiwewuragusenarifob.pdf
    • http://agnieszkapawlik.com/userfiles/file/bajekozon.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa964de754---tufenolitotojepiziva.pdf
    • http://bukharajohnscreek.com/sites/default/files/file/xedasitinupitexizaxowe.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084adc2bce9e---85945355908.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1feeab7231---raxeraninifepa.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/o9m7cmr0ojvphq28mregirgsfc/lafezikorefovezakutod.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sp2ts8nvtrqt99dmkg4k5kpsum/gizigerobavewi.pdf
    • https://aplusadvance.com/naver_editor/data/file/53197257185.pdf
    • https://daismene.it/file/68834592108.pdf
    • http://marymo.ru/uploads/files/fepemanosegafemifu.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/e52d8874ca1181d11ccb6030a89150b2/bitetegopovisebi.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16089d835a253c---70185282705.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gangster+bengali+movie+online
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f565.bin
ed87a53f6625075174a81da4a61f1846fe886580e1471adc2a8d69647a2238e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 5236 bytes
font_01_sfnt_off0001072c.bin
abbf7a02faa7541a08fbd11c297edbebdc547c8dc00b13d1737d33ae8705e605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 12116 bytes

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