Malicious PDF — malware analysis report

Static analysis result for SHA-256 e224f8e3593fab39…

MALICIOUS

PDF

77.1 KB Created: 2020-12-07 02:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f8a19007b2df6150d57d1bc292ad96d5 SHA-1: 1f06079f7cd618d63e2e00190ca233ac9bcbc948 SHA-256: e224f8e3593fab3956734a7ae8b27b53d3d2db0ccafa6478dd46f56d13be5f7c
214 Risk Score

Malware Insights

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

The PDF was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. It also contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of malicious links points towards a phishing or redirection attack.

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://ggtraff.ru/123?utm_term=grupos+de+san+luis+potosi+nortenos In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/roriturosiw.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/zapokatukexogax.pdfIn PDF document text
    • https://sikupawabur.weebly.com/uploads/1/3/4/6/134624396/79d0bd689b4.pdfIn PDF document text
    • https://zanasebumafuwaj.weebly.com/uploads/1/3/4/8/134899829/6107745.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/5fc2a60b1c8c7413143d24fc/t/5fc4a53fa97599144e8c4a67/1606722880337/zoxazivukapumalikejoje.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/awakening_the_heroes_within.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/boiler_draught_system.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0feaf0a2757459be36412/t/5fcd67e7a87f9f1b19ecc156/1607297001182/50695504515.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2aa47ab79f442f234e961/t/5fc502eccb3e0f5771ed3b13/1606746861934/pilenuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dc971c8c741314319700/t/5fc3ef393485235c863fcbaf/1606676281885/age_of_consent_marriage_united_states.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f7fa3bf4b14abc3d51e/t/5fcd5d62eb18547f4b96251a/1607294307472/online_graphing_calculator_ti_83.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_off0000f096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 4984 bytes
SHA-256: 328ebbf9b9bcb01b1dbb0c96e4f063230640810a95e841eea01e6c2d3fcda1c8
font_01_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 12024 bytes
SHA-256: c410dfb47590396fe673b6fbf91e231ac9b5c91fb1601a9e71354c2bd870560c

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