Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade3b196e112e9f7…

MALICIOUS

PDF

100.5 KB Created: 2021-07-27 23:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c10fde2652644b0477c2abe71198ee5b SHA-1: 998182b7cd755ab3c3b1dc5afa392a7ee378bc0a SHA-256: ade3b196e112e9f75c6da8e54acb0fa3d9d9a314f8878854c06005a9779ef85c
164 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to potentially compromised or disposable domains, likely to facilitate phishing or malware distribution. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://perfekttorun.pl/pliki/82432752536.pdf In PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/li6a0rqcuvc7tu6jhlm4cs4a2p/kibafavuv.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/dexosugewuxugowupulonu.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/0bdvdousi5i6ae1qvqpo6il5p3/58027998247.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/32334393249.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/ne01labvhubsaoj24r0vhnst17/zalajejitipok.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d23ab8f6614a194b657dbf9d7a670e8a/33594711388.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210726_4347FD3AE315FE47.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/redefadapiro.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f8b4abaed0b20de48fe61a434e4c2b63/piresurolevebaxi.pdfIn PDF document text
    • http://beiks.info/public/file/10646612346.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/72880369573.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/52763929126.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a5d0b895---xatem.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/p6d08gf01hsdufmbo75241vqnr/tenopajoso.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/d4e471077c8d261b0617a83f96365e4e/31348686367.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/82shm48npdrmsk7ts3qch8h0v1/29627765978.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/a3c336ba30bbd2d82ca2e063935d1055/tigobibikudirajojigejo.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b26df012b---51518803265.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/pojumaxixukuxox.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/kifedixagolo.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9eebd9f54---wunofoli.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/22246334918.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160987590d551c---texabupem.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/59529415965.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e35406ed3652e0898c7dfd53b0ecf380/27938000377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=cambridge+checkpoint+past+papers+grade+6+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 11452 bytes
SHA-256: 9dde5e8515784f67191bf3bf645f5effd6d3445be1b33cf4ad446861fdeff7ba
font_01_sfnt_off000139f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F3 17940 bytes
SHA-256: e9f20c02cfc336e87eda19bdc6872d0d9ff3b2c7f93bc20bcb7dd7b674690e52
font_02_sfnt_off00016965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16965 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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