Malicious PDF — malware analysis report

Static analysis result for SHA-256 80693cbbe83d4669…

MALICIOUS

PDF

86.4 KB Created: 2021-08-14 21:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2614b032df534367d41c682633e89e94 SHA-1: ed6807b9f3e805ac0fc69c769d3bc643f049f0e6 SHA-256: 80693cbbe83d4669ecb67220d7affcde37162fb34b9a31f5b8e9057cf65cbf66
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded JavaScript stream and a significant number of external links, many pointing to compromised or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious sites, likely for phishing or malware distribution, aligning with the characteristics of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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.
  • 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.
  • 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://acrgroup.nl/userfiles/file/xasepinox.pdf In PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/rivagovapifagibugi.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2c9fc7daf9710225f49ffc061dddffe4/lumifoxig.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4e4f40ca0---73606129673.pdfIn PDF document text
    • https://dm288.rs/slicice/file/75163541664.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/46576903295.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/b5dd2942419727a5502af720aace7430/ronageboxajikaretepavesi.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/32694113402.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/16cb206f57bd00fd6a55d0ca588479d1/21171687809.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/e758ts064fksus6hcn0pjnn7k4/30501606740.pdfIn PDF document text
    • https://room12shio4.com/contents//files/kivugapekofuwesoz.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a393262f830---kalukifa.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/kuxosifunetuf.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3c50eb2fb---kalopa.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cef9463a51---39573401084.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/3b912e7bae160a470cc49cdbdc9141fe/bawogiluz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7156d3da2---24831871765.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/minuvutifazek.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/58892826917.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0797f12ed---besudimogivano.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/bavivivababosobevefowom.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074472c238c7---jiret.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/orl4bcou31766snlph648hvdm4/wibowurudejab.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/pewug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+put+casio+fx-9750gii+in+radian+modePDF 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_off0000e816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE816 17544 bytes
SHA-256: 80c7ebe3d747d435c281e6f19aeaef56d4ad6175fdd019b1a4b4d4175cd00b1a
font_01_sfnt_off00011657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11657 11704 bytes
SHA-256: 790714a9b7da87bd809a6c5245d12853cad763e7403caec4dc6c50f31a88a114
font_02_sfnt_off0001323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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