Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a5288c759869d00…

MALICIOUS

PDF

81.4 KB Created: 2021-06-11 16:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e5926bb72a3c372c0004ad0abf79edf4 SHA-1: 10a1f50cf2829980cabc58aece07a1e79188ae83 SHA-256: 3a5288c759869d00dfc6366cea57f93fa646f6ce955dae6fa21304df419cf2d4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The document body and extracted URLs suggest a lure to download a game, likely a trojanized version. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=gta+5+android+download+ppsspp PDF link annotation
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cd9b682be---98036493300.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c203ac98---pesifonuninarerabeson.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a9ada84a9763beea79010413c30853ab/50399200731.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/akqm39spqvalnircbb2l4rgcv7/61152508752.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7f01342a8cde1e6447bc764863524942/59993823471.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/43da70f54b49f50334f74b1f8169fc44/gogarugakekemekusagiposo.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608378d346532---liwifepewuxarepuxulureb.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbc11d1e7---xalirudeb.pdfIn PDF document text
    • https://davaocarrental.com/images/file/5797112501.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/g6fuskhspvskp8fpmpv9nmi11m/lazoxoru.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090104cf39e3---19787105738.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3ce83466d---tubikopugenotemidelevimej.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb8cadb8c5---bulojizufofe.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/xekutixunusamiwoxaji.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e61134f52f---tutaverigofaputaw.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/p8po9nk57tb7mrsbe1899m06l0/wegixebuboso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 4868 bytes
SHA-256: 5596f21aa41d9268cb6d8db750c7abc3d418e24ab1e38f5d62f7f3ff6175b8f0
font_01_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 10940 bytes
SHA-256: 08a32441dc3c288f96533e3164220c772a236e20600a0ed4a7fd8b427154950b
font_02_sfnt_off00012a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A89 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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