Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc17848d69ad20f…

MALICIOUS

PDF

81.1 KB Created: 2021-09-08 21:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: cc630de4ae432b722927a58700c9ba88 SHA-1: 10d6ca46cb8c79c489038d6690879b022c25ac83 SHA-256: 4cc17848d69ad20fa6d57d80b9b8d82db9b8361b5aa18b4cae9899197f1157f1
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and external URIs, indicating a malicious intent to redirect the user to potentially harmful websites. The 'SE_INVOICE_LURE' heuristic and the presence of numerous disposable links on external hosting further support a phishing or malware distribution scheme. The ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://allytemp.ru/uplcv?utm_term=addons+iptv+2021 PDF link annotation
    • http://cecev.com/stockages/files/buzonomitexu.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/48598768408.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/8490518130.pdfIn PDF document text
    • http://tid.vn/upload/files/gigekevemapezis.pdfIn PDF document text
    • http://futimisdev.com/userfiles/file/4171541432.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/39380461248.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a1a98b7fd---71450890075.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/39526234512.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/xeguxavoxavadoruwubek.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/47173046628.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/ditibutibilixir.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/dewujojuno.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/dumelel.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/18271104243.pdfIn PDF document text
    • http://sonnenheizung.ch/fckeditor/editor/images/file/kebomizulelarofejop.pdfIn PDF document text
    • https://togeltop.net/contents/files/zewuduwovoxutatize.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/ribamosa.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/21730608590.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/lanunarapubasepusoxenivo.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/9136945218.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/zunutisalim.pdfIn PDF document text
    • http://lawngo.net/fckfiles/82385906809.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161304afa199e3---xixosa.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/86740985475.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/temadumariwijol.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_off0000d493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAA 10288 bytes
SHA-256: 828201507007051467390cdc05f26626908c3683601e0d6fe6cabb62018a1caf
font_02_sfnt_off00010401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 19736 bytes
SHA-256: 504a89ea80eeb7acb0fe9ac131e59eb897fb0cd188bf3b2781cdbb79ae62c4af