Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1629f4b11cdc2ab…

MALICIOUS

PDF

74.0 KB Created: 2020-12-19 11:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cdc2f10052386b5fc4569a7f7a07ae86 SHA-1: 545b731f2ea6286f3f8051c830a0b371983ca61b SHA-256: e1629f4b11cdc2abd7fb4ea5946c1c7fe544c4008701f7a4d15b80c7d0cbbdc4
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to known malicious infrastructure and a link farm designed for SEO manipulation. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to redirect the user to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=catholic+bible+daily+readings+free In PDF document text
    • https://guromofir.weebly.com/uploads/1/3/4/4/134489627/vetibavidexa_xaduriparitadab_mifevi_lopotu.pdfIn PDF document text
    • https://gowosupene.weebly.com/uploads/1/3/4/4/134489802/xevuxo_gipujazarix_genunixetak_nadaregokago.pdfIn PDF document text
    • https://peroleliviw.weebly.com/uploads/1/3/4/6/134648746/wobazodazedepazaxap.pdfIn PDF document text
    • https://pevetuximamit.weebly.com/uploads/1/3/1/6/131606263/4264781.pdfIn PDF document text
    • https://mupexopuwes.weebly.com/uploads/1/3/4/7/134722910/0496a56.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/legifisu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5fc4c7ead5f12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/davubewu/gurugugusa.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/80378520075.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/igi_gtl_report_check.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf595fcb3e0f577146a715/1606375776410/80910669603.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/6084402791.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/nixawufe.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5432 bytes
SHA-256: 41f4027ded5c203afc6a8c7f95c2c670ba16b8e2e2c6182d791154c79da9f31c
font_01_sfnt_off0000f5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C8 11120 bytes
SHA-256: 6b2459e0150718bab6e3daed9c78266bb1e38da454bc5a2c39ead718335e2be9

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