Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b964b02e62cade…

MALICIOUS

PDF

89.6 KB Created: 2021-06-25 20:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ca5977a1052474933815396774e4920 SHA-1: 6af9b879fc751d26209d4ceddbb6bba5b38ccfb1 SHA-256: 72b964b02e62caded6cdb1d8a584c83970b1f5ce1b3b124b2f9ef91f37371cdc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://gilbertems.com/videos/file/97227839295.pdf
    • http://kingalbertltd.com/uploadedfiles/file/70396261693.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f26e069bd---74674793733.pdf
    • https://cuisinescartier.ca/upload/editor/file/44804032007.pdf
    • http://php-lounge.de/userfiles/file/ganopagaruvifuvogiw.pdf
    • http://stalmost.pl/userfiles/file/xixesini.pdf
    • https://audreyheselmans.com/_files/file/96365243679.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f974e53a39---womofobifidinuf.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8dacf1cc00c502d754e7bac2df3e1040/3927182352.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609d47421ff1e---55192543369.pdf
    • http://vector-luczak.pl/new/fck_user_files/file/56199848999.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/6db55d3c817b89adb48e4671ce73d91f/mudagodimozogutemewuwabet.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad70b1aed0---61624928731.pdf
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/renupazizogunujozurinom.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a50c02392cb52f37cf5d1cf655ae8a0e/78101675237.pdf
    • http://laclonghotel.vn/upload/files/tufesizejolipolagax.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a733e9e0c13---7880651350.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b07a6eb7---5697378113.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/9schvnfp21r88535ahb423va1o/faxijedorapuvik.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eebf461bb---26910140519.pdf
    • http://aceonlinementors.com/userfiles/file/pogofisipototivegodamenuz.pdf
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021061907382780554.pdf
    • http://ordineveterinarivenezia.eu/userfiles/files/monumokite.pdf
    • http://mazdooradda.com/userfiles/file/mozivuwerajeloramigagelo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pretty+on+the+inside+chloe+adams+mp3+download+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdab.bin
34c56fdd9100f2ce1c2c435affe2ecc4e46c375408cb6989e68f2dc93fa63756
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAB 11256 bytes
font_01_sfnt_off0000e7f8.bin
1ad98ef3197630ad1e030ca9d37a4754980192ad4d5f3fbdb53655a3fcf9a248
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F8 18028 bytes
font_02_sfnt_off000117d6.bin
0da88b10a6f7d94702b8ab5882412cbff29c8b5958db4d1fad98a5c5ab75d153
pdf-font-stream PDF embedded font (sfnt) at offset 0x117D6 19032 bytes
font_03_sfnt_off000136dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DC 16792 bytes
font_04_sfnt_off00014ee9.bin
4471906336bc1fa3bdb86d6d095e7caa76145f8303669905e5b08205f45e492d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE9 1884 bytes