Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab223f6e633e639…

MALICIOUS

PDF

81.1 KB Created: 2021-08-20 23:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 74e0f1c5c3d6d03dd65995b96eec89bb SHA-1: e128e1af0d553f1bd26190c18df6ee9782b72a93 SHA-256: 1ab223f6e633e639d88f476c01a77651bea129ddd76140d478b71b989c502c73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress upload directories, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=mensa+iq+test+answers+2018 PDF link annotation
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/39bcd522fb9d19ddf3f1ee3ca0efb026/91374142409.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/41923fd8d2af18819e9cf81e40657add/zovatoniselexekoto.pdfIn PDF document text
    • https://autoskola-scp.com/files/faburakukopabakisi.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/7a9711746b76b14c14f55d59b2e9887b/84352365527.pdfIn PDF document text
    • http://toonesk.com/upload/tawopik.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/32284499901.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/lebofidevokujumule.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/wikanit.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/2cd0b81e2d8a03e25191859e71eb3cd7/bekikuvobewazek.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1860d823---31562224335.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/0b904bed4250311ef8f1d7c412896aca/zafagizabejasuvow.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4845c6b92---dukipozomorudixe.pdfIn PDF document text
    • https://coatielectronica.com/files/87497825420.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/98275458723.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/trb8h2fbdbvonkvvg1ea4k1ri3/19592786056.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/91eae04abfcc622ce98e8d8b9d91f700/voxepewujifotegaj.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/50382936571.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c33ddd3f9---rumubazo.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/08a181e2fc82aad2e0e3a11ef00beae6/jukurasabes.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/juloziwodik.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/jatonujilo.pdfIn 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://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_off0000d7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 17692 bytes
SHA-256: e84dc9f3920695b3f912461ecfc1548c2edf3c1c0ae9bebba433a282c0398114
font_02_sfnt_off00011e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E49 10664 bytes
SHA-256: 1fa6ea7f2a23f73fbea32a4048046d63310acdbdcb938ee7322bd38e77ca7d9d

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