Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60cb94c732a916a…

MALICIOUS

PDF

88.6 KB Created: 2021-02-11 13:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6e2bfe5797405c38711ff1fc068f185d SHA-1: d0a82aaf956e40182d87bd75350d52326add1b08 SHA-256: a60cb94c732a916a3feac0c247efe8ade8aee3df58006fbe9b30c56dc556e85f
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a URL related to 'avast license key generator free' indicates a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit users through deceptive content and link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://jottigo.ru/wb?keyword=avast%20license%20key%20generator%20free PDF link annotation
    • http://jejasuresefuru.22web.org/risk_arbitrage_an_investor_s_guide.pdfIn PDF document text
    • https://kitipodowenin.weebly.com/uploads/1/3/5/3/135383326/gefojenugabomizubezi.pdfIn PDF document text
    • https://lojimosaxamigek.weebly.com/uploads/1/3/5/9/135976806/vojajuzadokile.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fe07d0cbe3ba.pdfIn PDF document text
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/165e7cd.pdfIn PDF document text
    • https://litisenos.weebly.com/uploads/1/3/1/0/131071047/mowalaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407331/normal_6007efaa54171.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/IEBhgii/upsc_new_calendar_2020_download.pdfIn PDF document text
    • https://pupalizote.weebly.com/uploads/1/3/4/7/134716330/869423e05e70.pdfIn PDF document text
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/ef4326.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/zavafumo_jexun_subiba.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/4c70b713.pdfIn PDF document text
    • https://cdn.sqhk.co/suxepemup/QhgUGUt/62700181397.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BD 5052 bytes
SHA-256: 04708d604115c2e73465835bd9bce538d05e6c0fed7c537006670752eaab1aba
font_01_sfnt_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 11052 bytes
SHA-256: efe5bc171d9cbe418b0b5fd7399f74cf647b1051643df4edd41fece92406a957
font_02_sfnt_off000130c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C5 16428 bytes
SHA-256: 2e223c5ada1d910af65d64e61b46c45bdcd8e7f670476329a03b78ad957f9857
font_03_sfnt_off000146ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146FF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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