Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea4db80fb7b853c…

MALICIOUS

PDF

104.0 KB Created: 2021-07-18 02:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7ef5a0a2b6192509c18e9a1eb1371a04 SHA-1: 7eacc5187d0d98183d7c5be10196bb85cc97f506 SHA-256: 0ea4db80fb7b853c1eec9ec8c20e29e83791bddad4371d9ac53082ab698394a1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed a link farm structure, with multiple URLs pointing to compromised WordPress sites, likely intended to host and distribute malicious PDFs. The presence of 'utm_term_redirector=True' suggests a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2955

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://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075010521277---36593093869.pdf In PDF document text
    • https://igruppe.no/ckfinder/userfiles//files/neterojetuxozetupisidaw.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/67435354254.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aa45e1bcf---zovap.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885c35df9ec---44084100729.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/68879184406.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ad73f7a85bcb62aab09c66e7042ddc24/toxiwudamajuxozeligakul.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/d15b16d1e6424e06334718882769b7e1/gatekufe.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/gtr740vgs1bnujs68pl1mf5ego/zugovulaluzisoruz.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/9e87493381683b719a9e4761aa8a8129/womajoxubevopepojosutesi.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d72625d91---kereboj.pdfIn PDF document text
    • https://dm288.rs/slicice/file/jeputuwakatefuzeke.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f834d95a49efefa2efebf41f2a0bb685/modosazijefosudujot.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210701205605_mt7wgn.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c07b3f3a467404b8e20d6d96f2f09563/lukijokupupulamelerer.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b813765f6a4---69785016082.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160949df503b78---fanun.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/869849692.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/62065710240.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a7b7a3da3---dowegamoduk.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/80611472824.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/1ddb7e7dc19c317dc22d71d29ef9ef83/govalafifojudiga.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/e9m6mgreo0ba38mjarj0fa4i3s/97184786514.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/18950402224.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sonic+chaos+apk+downloadPDF 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_off000126b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B6 18728 bytes
SHA-256: c92ce7cd62147e9a7afea94096cbf0188e35cd43bcb4e799f3cbd0a5df6d4b48
font_01_sfnt_off000158c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C8 5352 bytes
SHA-256: 57ae47399e92e4e8081d681a0bd1529f48b48fe9300e34ad2515805f345dff97
font_02_sfnt_off00016cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CB9 16276 bytes
SHA-256: ef858b01719cec29ba59f81a977f79613a1aab7fbc1f32c2ef09c5dd0d876d7f
font_03_sfnt_off000182b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182B7 10532 bytes
SHA-256: 399fca9dec322070d4ef9ea037ebd0690a8bae0d3fe52b23931d8df2fa282d49