Malicious PDF — malware analysis report

Static analysis result for SHA-256 177c7c44d4c4c106…

MALICIOUS

PDF

90.9 KB Created: 2021-07-15 11:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 83b1631cb1dd40906a201e139691e666 SHA-1: e4aa25f14290a31d9d1f67f2368e6e23bb52f023 SHA-256: 177c7c44d4c4c106bc9fba861ae989b84a011fedbd111cce607f1d2e7b1569f4
156 Risk Score

Malware Insights

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

The file is a PDF detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites, suggesting a phishing or redirection attempt. The presence of multiple links on disposable hosting and the use of UTM parameters indicate an effort to obscure the final destination and potentially track user engagement with the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/5gl2l5onkel6o1tjqbap0isp5t/zutoxivuzafapuxuwipimaf.pdf In PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/61883845758.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/xonalisezugatunifepata.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/937d75e4d846da503aabc62f35c0c4c5/59474221039.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/suwedaboriwawanidoluribe.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/15828459091.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/t2jo7cpft5j69da6146153lubc/labav.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/85773814205.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/u7kmk566vamibqq0i5o5mthj3h/34100094087.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/356ppjfvfb9masc35j11ajifg5/gimiwite.pdfIn PDF document text
    • https://ready4use.ru/uploads/files/pepufoval.pdfIn PDF document text
    • http://ledins.lv/cms/file/24901162671.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608451b69c039---rojuwito.pdfIn PDF document text
    • https://samudra99.com/contents//files/42345032257.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/qdk0n5no1smqfu4t407a4ef9u3/sokevumumiv.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/82934450673.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vd2oaej2qvd6amirec7irhqms6/mobogajamudevajuwor.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/bijezefinaforenazopef.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a43d1a90554---68688207041.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b869898357d---xerigogotupowapevakaluxe.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/83809813482.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/61972884796.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/94aa6b732c0602d8e01051e6104a0519/nabokukeridaxoma.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=sweetwater+police+departmentPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 10668 bytes
SHA-256: 7279d5c532b9763f7d31e27c3ac551086ec0f1fa2be182060ee54292644f5b7c
font_01_sfnt_off00011a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 16916 bytes
SHA-256: a8dac3325ef820f3832cfddf07e810cb89fd3514a3ed93f509ac506fc1d5e53f
font_02_sfnt_off00014689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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