Malicious PDF — malware analysis report

Static analysis result for SHA-256 42cd7299c6c72ff6…

MALICIOUS

PDF

76.1 KB Created: 2021-09-02 00:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 35bc1052d95aabd2b4ff26a2ce9ad607 SHA-1: 8ddc85992a01db19368459e06caa9d4f1f499c2e SHA-256: 42cd7299c6c72ff6e466fb99e2b04cc643b210ee53acda0f0ca20b69973e758f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. These URLs are likely intended to deliver phishing content or further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • 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
  • 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://inwebjor.ru/uplcv?utm_term=medieval+times+feudal+system PDF link annotation
    • http://adance0112.com/upfile/editor/file/29777262144.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c08e971e7a37057275661c601e2233d7/zojexidanapitabavu.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/66966201231.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/lt8qqhbn3b10sq9a7fme6iq286/26781372172.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/92155531921.pdfIn PDF document text
    • http://atek-ent.com/upload/file/92599539748.pdfIn PDF document text
    • http://wawa757.com/uploads/files/40125251096.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/21617009751.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/59221dce076a0906b6a0d772527de0cc/notun.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/71580433717.pdfIn PDF document text
    • http://donghocasiochinhhang.net/uploads/userfiles/file/77591787629.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/04o4jlah6en07vcrvdnif36sie/37164648305.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e69ad5bff---kopojajepekuwoti.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/rabetakimusew.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/xizugilagikowojafimofisa.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b833552c3---68188968164.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/pqms6jvnnprpo0us9h5t1imel2/77481318898.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/34540753064.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/aa6b8cca0caea335a3c5a27dbd165a5d/61194946800.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/85532491528.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985ce7ac8d4---64717366254.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078cf9c2cc66---13672510608.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/93581123784.pdfIn PDF document text
    • https://edbcagliari.it/file/39440815372.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/jegofutejulenepepoziwob.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/74304857196.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC872 16392 bytes
SHA-256: e4551cb2fadad3899010495644e4ffc5e57f6b89b0670ab63de7774470aeede4
font_01_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 10464 bytes
SHA-256: 6e981825ca8b7d2c7c83f2a1219087c51991d3f4242a6e36b7d1b4f300525275
font_02_sfnt_off00010a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.