Malicious PDF — malware analysis report

Static analysis result for SHA-256 f033f7179d7e7b3e…

MALICIOUS

PDF

91.4 KB Created: 2021-07-06 23:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c8b547629b28494ea323437500740989 SHA-1: 3d15f6cbfe39dc38c3b9c2736986c6e910947512 SHA-256: f033f7179d7e7b3e47254f256019b692941a0e51ce4d166a37193802f8fb06cd
156 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. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting sites. These links likely serve to distribute further malicious content or lead users to phishing pages. No scripts were extracted, but the structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5088

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b4c617df61bda870a8f19e38346b0f82/87005789342.pdf In PDF document text
    • http://marinapogon.pl/upload/file/zipegipipax.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/qv0t6upqhml5kakmoeld36m1mi/modozun.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/5893c32fc5e995336d01175af9676bc7/74335949612.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a478c83a654---24462962670.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/97691283347.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/no8d1osn4l5or2mvuap9c11n40/wifikiwumigajutuput.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094ba18bbb6f---gamox.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/54978966723.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/daxulipebuvut.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/63bdddd9b176e845f53827844d96a8c7/vojiwakuwujufajet.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c87e28e11---97262648312.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/disuxusetekasi.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/jejupebileje.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a78d6977---bewab.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/1agmb94j9nk2rp8b0igllt3o0c/gorubirelivixuzoxu.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/64042163044.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/52119979148.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/bk5in81mkmctpii9bntvp1uag4/jofosemixi.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/19906179976.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160762b6f27c41---8611929755.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/24722777025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+fire+red+latest+versionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 17352 bytes
SHA-256: 748f816da04fa79f9c1aac8cd31a67c9de454b061be6753402f6a61061f1c1b5
font_01_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 3288 bytes
SHA-256: 78a9b8252dcc651ceadc84258c9626cd9787c72ab94b8f2c58d78b841c34a13c
font_02_sfnt_off00013aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000152b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B9 10672 bytes
SHA-256: 2e83f76f62ebb52d80139a4dab2363237a5dfbbf792fc10e50351f8b93f7b5af

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