Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9ff9caf9a63099…

MALICIOUS

PDF

77.6 KB Created: 2021-07-07 18:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3883c9e37f9de4bed9ba329dfffa48ad SHA-1: 49c4a19304468c5ce6c67de8fd89874c9da2869e SHA-256: 7c9ff9caf9a63099e4885dbe47dab41f2e1a422db24424af31b880fa7176ced3
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest the document's purpose is to lure users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7208

Heuristics 5

  • 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
  • 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://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/28tca6f38ca6elgjpmaetsgrp0/64474821720.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dac12a18fd7---26664752847.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ktnilq13a6b92ges5dcnm8d6m6/gofaselojenapasa.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ae00439c953---53427727023.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160afb6c4df42a---bebamerimoxedubumezozedo.pdf
    • http://apexnepaltravel.com/userfiles/file/68915002659.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972e51156a4---vakowexaf.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/efa82f264a7c62fbf010919b8dafd15e/rukitefalepotujemoguw.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607770658b80a---xinotulifosopori.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/m46o7eqtdcmo8s1a8ev7mfp88t/98894250697.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a7dbfe6f706812ff0f5379f07d894e03/kowosabozufovugogak.pdf
    • http://tutek.eu/userfiles/file/41173271939.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/4d167e0935235b35908db727e11e8d1f/nidisupe.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b6435e6d0e9---1608902992.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c331a880446849708f05a8c3f963d9e/24176905444.pdf
    • http://ats-dz.com/userfiles/file/webiragapowefufofasaleb.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/15f9122c2b8f11254924947e60ec12c4/36428012985.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b75301a37b---62001748293.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55883356d1---felapafogena.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/ee905e4f2fd8c84f37e4d429ca6e1865/40745728858.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095083434af6---6414351197.pdf
    • https://baobihungphu.com/media/ftp/file/30590148685.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd34222f6---72400211358.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9adce3e807---gizuvoxenufinarelumizo.pdf
    • https://estoniapools.com/contents//files/kogewegu.pdf
    • http://kovacsoltvaskerites.hu/images/file/nosagenoviv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=meaning+of+the+word+precocious
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fbb.bin
d68d7eb1307fa127d77f56803d85d059a4db61e5f9591ace5a8ec857d930e5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBB 17168 bytes

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