Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49c0205d9c03cad…

MALICIOUS

PDF

87.2 KB Created: 2021-09-18 05:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 76606b954aa43f4c8a91d2c854185167 SHA-1: f36d8d165f76890f7c8c4c7456f2e9f0866dc597 SHA-256: c49c0205d9c03cadc8b6a7e122dc4d60dc160265cc124f69e532a1182695e7ce
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.005 Security Software Bypass

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'SE_SECURITY_BYPASS' strongly suggests the document instructs users to disable security software, a common tactic in phishing or malware delivery. The numerous embedded URLs, many pointing to PDF files on various domains, indicate a link farm or redirection mechanism, likely part of a broader phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://eliteplacementagency.com/uploads/files/29752905116.pdf In PDF document text
    • http://telegid.tv/userfiles/files/73673809204.pdfIn PDF document text
    • http://www.polni.si/Images/files/65545955085.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/zelusukujuzatibilametutu.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/risijuderaniz.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/3654722535.pdfIn PDF document text
    • http://jcon-aps.dk/userfiles/file/lapidirodumigi.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/48157804034.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6f26313952b58cf9c24e60c5067f09b1/85083505319.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/solexefi.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/81805614117.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/6139b446040a2.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/gumaribavulekuxogedefog.pdfIn PDF document text
    • https://tebra.si/userfiles/file/7973428055.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/77948152326.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/18543518086.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/94655103530.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/36005937045.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/51129312841.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/5538062974.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16132595228fb4---zamarerisumex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+lock+the+apps+in+android+phonePDF 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_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 17844 bytes
SHA-256: e96613ea0142284aa48622e5eefc04fc265184e8ddbdc9ab101c372dff019e9f
font_02_sfnt_off000136af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AF 10780 bytes
SHA-256: f66d94cf3bbf73cb934adc1e59e4cb44e1ffd734b81c692f667114aab47cdd20