Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2b43c8d91f15e8…

MALICIOUS

PDF

84.8 KB Created: 2020-12-11 08:29:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9fcd02a6184db32c137a4bbce734620d SHA-1: 2a9377d72e48d94d300bedb54eaf5fe0157f955a SHA-256: ef2b43c8d91f15e8cc2b83517c73ce35a5be6d537688e9db5b0e0eefac0510a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?utm_term=genius+training+student+workbook PDF link annotation
    • https://relitemora.weebly.com/uploads/1/3/4/3/134352419/ae3bc8ce7d7f0.pdfIn PDF document text
    • https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/52d5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe002b3c6ccf69f324f604/1606287408317/66265218884.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc129dd17e7202640ebdc1b/t/5fc2fd8a3f75b16643371ff9/1606614411454/how_to_hack_hay_day_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc365b19698b02c7f308a77/t/5fc4d1f2f81c9a2a0c3a09db/1606734323012/19780318632.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd131452f90b7fe52ecb/t/5fc2d40acb3e0f5771adc4c2/1606603789854/football_manager_2018_apkpure.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2b3c852d8c0c4e23464c/1606232892432/ace_family_catherine_height.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52ccbcd1e280355effc06/t/5fcc470f978da30c56f1e6e0/1607223056685/office_annual_day_quotes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27e0b2cf09257bd761280/t/5fcc2be43ff1011540e22b29/1607216100762/archer_and_olive_pens.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52b1cf9866f3fd2efc2ac/t/5fcd471f1e1a4d7de138ba14/1607288608685/13434720418.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc556b8a3bf4b14abc694f3/t/5fc6e4563d56556d142dbe9e/1606870102817/photo_editing_software_free_download_full_version.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc788308d6e8c3767c3d910/t/5fc968b99901aa382b34c360/1607035066673/istation_parent_portal_letter.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011975.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11975 24876 bytes
SHA-256: 0c1aeec4e996dc802613f4141e6da2b49083dc8d6e226b074b598f85f86c63e0
font_00_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 5288 bytes
SHA-256: 29654a577176361c61df6dcb49f82f81fcc2f704d9277b18161f5d21c4ff770f
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 10640 bytes
SHA-256: d9d19f3115f9bfbae51db32699b8334b836a8df920d9e3c3e16ecf036b66ae14

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