Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6622d1578efc892…

MALICIOUS

PDF

73.5 KB Created: 2020-12-26 09:21:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 63ad534f8919325db157bcecfba5e047 SHA-1: fcc2b83aab7d021c04b1462c6f5ecdfe8263b12a SHA-256: e6622d1578efc892318ee1a2d40a8aba2fa1c8408ef3bcecc5df0847de0c5606
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or potentially malicious content farms. The heuristic firings indicate the PDF is designed to link to external resources, with one URL specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

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://gettraff.ru/aws?utm_term=road+report+cairns+to+port+douglas In PDF document text
    • https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/nevaweluji-dejosapota-nukapit-niwiruderoma.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/nidosanaleni_levegopeluras.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/1374982.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fc9a4928554c.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/dugip.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/simujix/red_leaf_logo_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/pugize.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/pozesaxevedekedo.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/sakoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/gaxufukuwupes.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/bimijizorebirezovuda.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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 5248 bytes
SHA-256: 799273fd74197276b680bc2df10bdbfb14aba8bf0e378689eb2b086fabcacaaf
font_01_sfnt_off0000f3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 11068 bytes
SHA-256: 57a77f27b167efca1ff4873259abebd90b0e4633519ea1d9318bcb586d9bbbe1

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