Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5ae922dac7bd0f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-26 12:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 13d739777d879d21fecfb2c723534664 SHA-1: 9039d18fa94d2912cf70ff869ee47685ff2e6b60 SHA-256: ab5ae922dac7bd0fddd4d530254b004b55dd8001cb8989a8887eb288c89371ee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or trojan distribution scheme. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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
  • 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://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732c31c5c7a---durajejojeramamuxubupenav.pdf In PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160772d5cbc9c8---toliz.pdfIn PDF document text
    • https://hojoairport.com/images/file/diwodadoruburibaxeji.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/808b152064f13d457e5f217763844272/55647550323.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/g5q0a7psuokidl92j7c2qbon0r/51026860688.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca410b8a76---belebo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d59439081c---dudalamimedatatatajaban.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/606204acaeedaa3e84d373d0a67a3212/govuluzasegexomete.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/5349424623.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/vc0btf0c3u9q6he2p6tncupqgh/muwazalotuzaduvoze.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072bb5a7e221---vanulunugegejisol.pdfIn PDF document text
    • https://laughteronlineuniversity.com/images/upload/files/63787034678.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/zokozibuv.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a02e629c61a---9160989247.pdfIn PDF document text
    • http://goref.ru/files/file/10641198529.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/51233712224.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/cbb956f3b8dd7b6059d29d1931bd3f76/ruked.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085a725d51a5---59352585140.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/7cd9c5038acfc108bbf72da50055db2a/zejidaduvozekalaxom.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/24472123031.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/zabafanomowuse.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/pokijalebuwudutozetolunax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=daily+use+english+words+with+hindi+meaning+pdf+free+downloadPDF link annotation
    • 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_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 11244 bytes
SHA-256: f170506a4391ab5029dbafcc10c210e7f212c977f31b3887cfa318ee4f9c7ad1
font_02_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 17112 bytes
SHA-256: 5e9344813592900948ef4b9d3b0fa44f249544c13f2c37a6b6c8803800260ed4