Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67ff7da1093145c…

MALICIOUS

PDF

83.4 KB Created: 2021-07-25 01:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ecee56b868bb000b999a63ed3e39ab7b SHA-1: 83d87843f6b68267f0170e0082afd87a8198e70d SHA-256: c67ff7da1093145cdc83e56a477879fb1fd4d7a2aedaaed009c3db83f17b7613
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or other disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/931e99a24d0e595dfb60621d926b98fd/sokamasidixewabavibuke.pdf In PDF document text
    • https://allmassage.net/upload/file/20210525031324.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/74279033695.pdfIn PDF document text
    • https://pabrikangka.com/contents//files/bipaw.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/4umbq473l257r5f6ttf2b7olfe/bosipokidifejulofaneg.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/i5a5kahp3gurja4njd1kk8f8a6/59301701228.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc8168c290c.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/44825049927.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160979394a0a29---21776186412.pdfIn PDF document text
    • https://arerp.kr/data/file///54013877900.pdfIn PDF document text
    • https://telenovella-bg.com/files/guxujezuxisadok.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0f064e6b3---lusipesafetilaja.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/53938834204.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/6648574904.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a6da8bde3b8---37481696594.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c1063dd1---jikefuvolaf.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/tidowodeval.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086bbb9ed009---7961433490.pdfIn PDF document text
    • http://bruisedreedfoundation.org/clients/4/4d/4d9d7eec3bf3a09fa0457ace138f6a4e/File/madunafemotez.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afc09cbb97c---gumebajokaxumusitugo.pdfIn PDF document text
    • http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/41837091771.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/91624605777.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759623c7703---25816799461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+defines+capital+budgetingPDF 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_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 16784 bytes
SHA-256: b48965ded9d8c090bcf94a00a1fd41fc2bc2bc604ac7e628c909bd6565060b47
font_02_sfnt_off000125cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CD 10912 bytes
SHA-256: 772eb052d76c3f3bee69e168eb819a739c3c432453ed3ff7a776cc60276da1cf

Open this report in the interactive analyzer, or submit your own file for analysis.