Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abae35d06677053…

MALICIOUS

PDF

84.3 KB Created: 2021-09-01 04:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 879e80dd59bb8b189e697422fec40407 SHA-1: e2458b2cbbd216364562860b3aad88a17bc58ac3 SHA-256: 9abae35d06677053ad3d5dc11fc3a151bb7efe5f69ef80d438e63b43f6dc9212
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content. While no scripts were extracted, the presence of numerous external links and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://crewmak.ru/uplcv?utm_term=sorry+just+woke+up PDF link annotation
    • http://greece-ex.com/images/blog//file/gixeder.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070501c2ee67---sevizilezikuxevu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/ac74c264ee6782148f2e91e57b6a6021/zesopineresitidikifaku.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/245591395.pdfIn PDF document text
    • http://kleiberit.ru/files/file/74308491330.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210828123401.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072c74a753d1---14963442470.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ue1c111k60rmm46q8j7qifrve3/98451062813.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106202241301055.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077de1187c51---fazesuzixax.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/bawat.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/ad87aa808c2c941194aa41cfbcbebb06/26982905672.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b12c3837---givevixig.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c0d0c8de9f229575f00c4f07549c2a55/39451192898.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c9813a55ea6---natofebim.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/77824821441.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/34576289296.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/e32b31b83e158873cbac0a35a983ec72/15067965479.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/mubevabuxinilu.pdfIn PDF document text
    • http://pmteventures.com/clients/5/57/576e8e71b788aac95a268099fab76a3d/File/22360643077.pdfIn PDF document text
    • https://gangnampools.com/contents//files/9573428823.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/xojitukuxakodukitemod.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832ddfdc177---zenopavi.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/nuvegeritigevi.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/63827744497.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/e520ec8fac3e64e387430ff9ea1d422a/86353303960.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/wupodomuze.pdfIn PDF document text
    • 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC732 20196 bytes
SHA-256: 1e90e7c9a0b4f64cc9f0c2876b5cf38a343525ab136e84caa5879c01bd44f1c3
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1
font_02_sfnt_off0001110c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12923 10440 bytes
SHA-256: a58dc7afc561a2e15584796c6c3a128bccca703aa79fbedfd1cebfe48eec449d

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