Malicious PDF — malware analysis report

Static analysis result for SHA-256 18fca2df7a15b8f7…

MALICIOUS

PDF

79.8 KB Created: 2020-11-17 10:47:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f613e4636c231594c84671e212fa6cc3 SHA-1: 16586c600eece59313a623a50bf02198d09f26d2 SHA-256: 18fca2df7a15b8f737acc33252eb7a95e239c6431a1a7d1dd01e11ade2a8464c
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to downloading a book. The presence of multiple external links and the ClamAV detection strongly indicate a phishing or malware distribution attempt.

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
  • 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://traffmen.ru/strik?utm_term=film+a+critical+introduction+3rd+edition+pdf+download In PDF document text
    • https://rixidagetowema.weebly.com/uploads/1/3/4/6/134612143/lofena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5fadcc155389b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403264/normal_5fb2773f494a8.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
    • https://s3.amazonaws.com/toguvaju/38250452099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabab6b0-ed72-47db-a134-f6a32060a312/joker_movie_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b3d3a8-6731-4fad-9b5f-da51f319e0b8/35505827380.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/sotojerarozomerukixide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/ww2_paratrooper_gear_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c9cd0d-b959-4a1e-8850-f088a2fe6472/tawanovujowuroperoto.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/besipug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfdf8a9-edcc-4788-b406-7b9c4af21259/39871690949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab12a6cc-8b7b-418d-b9fe-e01eacee936a/79857954941.pdfIn PDF document text
    • https://s3.amazonaws.com/sezutuma/27584518281.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/vomawexubesawuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF9 5216 bytes
SHA-256: f8f7a9a07cbf3b960d64c99b13a2762f1f8e8f05e356a9ac977bd377b96d80df
font_01_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 11248 bytes
SHA-256: 9512f067ec66313cff2cb557d35ba8b0524e9205cc2e92a3ac24db9eb7a4240a
font_02_sfnt_off00012349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12349 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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