Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2dbd85255e2f768…

MALICIOUS

PDF

80.6 KB Created: 2022-05-31 11:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 3aa62cbea92c3748684d281612a6ad80 SHA-1: c46c3614f0c0cf58feb82c5f3a85a48c64b360e6 SHA-256: e2dbd85255e2f768c3d8aa4d00f654095b9217870cea98f850e75900c004b8c1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL appears to be a search result lure for a book PDF, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yoyep.co.za/YmrXLWy8?keyword=ecg%20made%20easy%20book%20pdf%20files%20online%20free%20online PDF link annotation
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/9960168.pdfIn PDF document text
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/3304100.pdfIn PDF document text
    • https://kelutatu.weebly.com/uploads/1/3/4/5/134521402/jamofusi.pdfIn PDF document text
    • https://fosezuwupilure.weebly.com/uploads/1/3/4/1/134132817/845119.pdfIn PDF document text
    • https://zuzilumapodebaj.weebly.com/uploads/1/3/1/3/131382406/7525165.pdfIn PDF document text
    • https://bujivopipagafo.weebly.com/uploads/1/3/5/3/135321681/sageroge_wupifi_kemewini.pdfIn PDF document text
    • https://sokexuwog.weebly.com/uploads/1/3/4/3/134351495/5453330.pdfIn PDF document text
    • http://casauthienan.com/fckeditor/editor/filemanager/connectors/php/temp/file/nonabar.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1624575cd27008---66860740853.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/60810749802.pdfIn PDF document text
    • https://kibibobufusasi.weebly.com/uploads/1/3/4/6/134643218/6719461.pdfIn PDF document text
    • https://ruweveti.weebly.com/uploads/1/3/1/3/131379789/6261423.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/51911498396.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/totarufinibasagapeputoxa.pdfIn PDF document text
    • https://www.sudicobank.com/ckfinder/userfiles/files/nexokuxava.pdfIn PDF document text
    • https://tetobalowuw.weebly.com/uploads/1/3/4/5/134523757/gawaziv.pdfIn PDF document text
    • https://kotugupevexaxis.weebly.com/uploads/1/3/4/4/134493549/dukabidojizudifik.pdfIn PDF document text
    • https://mepolelo.weebly.com/uploads/1/3/4/6/134626310/4750149.pdfIn PDF document text
    • https://www.kossuth-csepel.hu/inc/kcfinder/upload/files/89954628770.pdfIn PDF document text
    • https://tadozowilafozu.weebly.com/uploads/1/3/4/7/134710515/daluwelapozuvuj-kupemugem-gutekum.pdfIn PDF document text
    • https://sutevanu.weebly.com/uploads/1/3/4/7/134770908/25acf2d1837.pdfIn PDF document text
    • https://xofunulajadapo.weebly.com/uploads/1/4/1/5/141524191/8ccaa757f.pdfIn PDF document text
    • https://zovuzutozureje.weebly.com/uploads/1/3/0/7/130739602/3fec8b.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/25505335028.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_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 17252 bytes
SHA-256: d48f272657ad4c32d8d71e23fd4774ddf8dc7bfe3474a729905b462112debcfd
font_01_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11781 11196 bytes
SHA-256: 4d91392fbcbcf4afe4aab8568506d24256e134685230071b17b3218e423d05f3