Malicious PDF — malware analysis report

Static analysis result for SHA-256 10194019f8196ec5…

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 04:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 937557933a0c77709c7126f2294c08ef SHA-1: 80ee32ce00b89e4924d6c8f558523f913fa1ca6e SHA-256: 10194019f8196ec5d312726239261442c6c02c915ce7579b56a2a875da997a29
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics strongly suggest this PDF is used as a lure to lead victims to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://wib24-admin.de/uploads/file/96045896059.pdf In PDF document text
    • http://clairvoyantinfotech.com/demo/images/56218909596.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/fekakoguxokizutugofekak.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/u0f3vbun8mal0kpqd50l50ru51/21261412413.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/90162543801.pdfIn PDF document text
    • http://boldogelet.hu/media/13546264455.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/46811638499.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/uov7grmbrbjmir5lap1d7o0h8s/xafavunovevugebu.pdfIn PDF document text
    • http://jhferry.com/data/fckeditor/file///fijipuxemenageju.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfd4c64e4e---kotuxitimewojavivokoxax.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/56c972f81d7b2c20c1b78cdf67f3ccbc/gubezawiw.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608f38c192f4f---62857181380.pdfIn PDF document text
    • https://voyagerf.ru/wp-content/plugins/super-forms/uploads/php/files/7283036bae576988e8f5ce4847c4f5fd/35707249176.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/96315559765.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd309b3a2c---28672378928.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16089fd9f7f2af---72288809734.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/42459331556.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/f5e2975baa2f0582ad1209224dbfd859/mubowasenagir.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/04f9d11b03afbeb6a697836126464267/pufanupo.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/08c9dd77dd846e20e67d97e3c3a1eb09/4602227895.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ae8grjp8dfjseit1shbaia35lr/jolotugonapur.pdfIn PDF document text
    • http://mp-journal.com/media/file/2357081275.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/8ed5519dca606fc6c90901d7b5e47b57/13328454463.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/np2srlq7reeqm73pf6r8squh1j/tekisumona.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/81807294872.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/509975dacf4ede22e2eb1e383b933a67/neteritif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=anything+else+but+love+pdf+free+downloadPDF 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_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 18008 bytes
SHA-256: c4b2353dd1dee7d9aff8e448b038b6b52da7d2a4f13f80c0cdf5db9ea1db4d47
font_02_sfnt_off00013750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13750 11264 bytes
SHA-256: 71eb902bb6086c8620918bdb4e1dca200151c8ffa0e6a167e6810430f50be8d9

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