Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9afd70db95159b…

MALICIOUS

PDF

85.3 KB Created: 2021-08-24 18:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6db512e0c295716c37c3960bf7b4e585 SHA-1: 0d44d70e8620ef20ffa4b9ecdd8906256aa4670e SHA-256: da9afd70db95159b807e21281b3aeaa4e4fc9bca9e20122b724c00c7b721824c
164 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://cructi.ru/uplcv?utm_term=dhoom+2+720p+full+movie+download PDF link annotation
    • https://cochleartudaskozpont.hu/files/99396460536.pdfIn PDF document text
    • http://thuocamakong.net/userfiles/image/file/18083777383.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/ketuxajowufado.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/kobatofebogu.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/55daf56da81bb36a1167ff9b7907d556/kesede.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/gagexunit.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/tidazirunutabajudufevape.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210720_A4FB5C55E224ABCD.pdfIn PDF document text
    • http://chikatere.com/Upload/files/93748612633.pdfIn PDF document text
    • http://bronia.org/userfiles/file/sisukefumi.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/toh61iuha2s5gog4jn66juhh8f/22366047214.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/47170997334.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/bevota.pdfIn PDF document text
    • http://cuatudongbinhduong.net/uploads/files/25508693652.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/c7985c38c057bde32f49d10a488fbcb8/21987888005.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/4oh7ucb2iae86meph4b21vo2ob/gamal.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210812_966DC67F07A0FC92.pdfIn PDF document text
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/1e0310a3fee9c85e9a19cbf7ab539826/solubiv.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/jawikotugejevazoroziwudox.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a340e2864a3---botigevilegumoguvuza.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/12e23eab44388b207bc2a06daecd3537/46350386830.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f458586a7a---85348396140.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a41495e7afe---robisaramo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9712d05a9---poporujujipagokazam.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/mebasuli.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_off0000e95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95A 10944 bytes
SHA-256: e38f6d8d4ca1d4cc16a2530071ee286ff1873a361cce3b824b7bbac41f44f564
font_01_sfnt_off00010290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10290 16980 bytes
SHA-256: 2fa0e5d00d6e59f96223aaec7ddaff175eec43b790de37fde115f34ede8d383e
font_02_sfnt_off00012e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1