Malicious PDF — malware analysis report

Static analysis result for SHA-256 e111f7291ba27dcb…

MALICIOUS

PDF

85.3 KB Created: 2021-09-06 21:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 856645172c54a3cf6656e9ea5e32717b SHA-1: f206242776ddad9e7c8578600fb15aa3b1536d0f SHA-256: e111f7291ba27dcb4634818a3f42d282db14be572f91e96278339fba2392166e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://pistant.ru/uplcv?utm_term=2011+chevrolet+traverse+user+manual PDF link annotation
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e5e01b708---getamarusazoxebosute.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608e01b833cb1---39622955711.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/49475433171.pdfIn PDF document text
    • http://vanphongphamhienluong.com/upload/files/zumiwupomapivivijof.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/6ffebf9b8ae501c3db0adcab7efc7c69/47492224456.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/65022134137.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/58066741574.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/30579453843.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/3c4e9d6d88c7f904e2738e96b05469b8/42352977563.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd4250ba0d---25251743454.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/mjhbsb057qv9pnohnk4a1vp55v/45416531056.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/81574156866.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/61745696784.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/7602422039.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/dekudojoverawejagukixi.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7ac24d5ba---levirise.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/80732945123.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aec930f27---80788332877.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/napomemefotuwaxajetufoko.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a06a352c82d---9503633636.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/nizasinubutesezosi.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/fevogoweditizu.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_off0000e70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70E 18796 bytes
SHA-256: 7e96d95f779057ae1cf20d3d5ce620ca19dd212b74e8c34e39fb735b57641604
font_01_sfnt_off000117d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FEA 10768 bytes
SHA-256: fe50e54f916a5636bca43784d7249158736b125ee3044eeea45bd823945140af

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