Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0ae70f53a2c9af…

MALICIOUS

PDF

63.2 KB Created: 2020-11-10 02:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b8d8734e3c36ee48f35a3612a29c2a74 SHA-1: 019fba58f070589da63194531bafb80a15b2b6ac SHA-256: bf0ae70f53a2c9af20ea31891f2c39014a3640aa2e4ee5ab00a39e0972902608
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute malicious content or phish users. While no scripts were directly extracted, the nature of the embedded links suggests an intent to redirect users to malicious sites.

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/123?keyword=raisin+in+the+sun+poem+langston+hughes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5fa2875d27152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5fa0ed74b6744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f8c4985440cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446497/normal_5fa25498beaca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f9c2f426cdd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5fa0fbff8b59e.pdfIn PDF document text
    • https://ligenoleka.weebly.com/uploads/1/3/4/4/134496601/pipalobezuk.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/9074186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f97066bd5c3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_5f971318db1c1.pdfIn PDF document text
    • https://tozarezev.weebly.com/uploads/1/3/4/3/134374844/mupez_mijapobire_ladogabuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8b5dab48e47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d9d4c3-8b60-492d-a5ec-dcdca529a861/voxojawotu.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_off0000bc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5B 5144 bytes
SHA-256: d72638d3f4993a37cd95087547badb4975ebaa580d8fa153c0f398f822a85b79
font_01_sfnt_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 10148 bytes
SHA-256: 25efa370ba1844c1e60c993d5d96412b18b84f6e24627c3ac9d8afa06501f7b0

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