Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe2448f42da1817…

MALICIOUS

PDF

85.9 KB Created: 2021-09-10 08:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 11bbe775b2c056794a1d740f32d5e9e8 SHA-1: d89704441eb46eb778c9ae9104ef4abbea7368c6 SHA-256: dfe2448f42da1817c7f44cfff9a8afe1cf791ac9bed5b26e4f2c0eebf9fb7b69
192 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and multiple external URIs, including one pointing to a raw IP address and others hosted on compromised CMS upload storage, suggests the document is designed to exploit vulnerabilities or trick users into downloading further malicious content. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oceanflowerhotel.com/uploads/image/files/xodaviki.pdf In PDF document text
    • http://ecole.ru/text/images/file/julubuzujerebuvuvimowori.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161320086b2706---sumitivataxutininavaxadib.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/pukajabiderugizifut.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/kapemese.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/gosewovotesig.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/numitukutudilavinigopuxi.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/jajugereduv.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/32760273589.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e68776ffe---jadabobesinefewu.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/kosoxo.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/mrfpq62b1omjrq3sr8gt6gtbm4/50119398476.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/19645143061.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/49189631616.pdfPDF link annotation
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16131a5cc842a4---4342491696.pdfIn PDF document text
    • http://belv.ru/userfiles/file/tovovabojadederefe.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161395219988ca---64321271672.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/6516906421.pdfIn PDF document text
    • http://rivucota.com/upload/files/35563727619.pdfIn PDF document text
    • http://canvangdientu.com/images/file/xobidenete.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/mekipabuxuxobepo.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/viruma.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/wijam.pdfIn PDF document text
    • https://oancora.com/ckfinder/files/42757812365.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=kumbalangi+nights+download+720pPDF 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_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 11216 bytes
SHA-256: f8267666d4da9102365aee03fde34273dffd24d7897471d1b8f75a74eddc58ce
font_01_sfnt_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 20876 bytes
SHA-256: cee59fcaf6a6e6264172dc3fcc3600fb4494b8eb173ee3c5ddefe3324adda0b0
font_02_sfnt_off00013189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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