Malicious PDF — malware analysis report

Static analysis result for SHA-256 f962127f55c7bec6…

MALICIOUS

PDF

69.4 KB Created: 2021-06-07 04:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8a9865db941cb97adc04525dcc7c5616 SHA-1: 67b9f34bc77527a285069844f0ba7ab8141d8821 SHA-256: f962127f55c7bec6da480ebecedce0a5e1841048ba88370da1621254647104c9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are dynamically generated and point to other PDFs, suggesting a link farm for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URL and the PDF structure itself are indicative of an attempt to exploit vulnerabilities or 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://smidgel.ru/pbw?utm_term=how+do+you+set+up+voicemail+on+a+vtech+home+phone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411483/normal_601996354c277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_602560bb694b3.pdfIn PDF document text
    • https://ripabefemedoge.weebly.com/uploads/1/3/4/3/134321398/6408240.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5ff65d966c5a8.pdfIn PDF document text
    • https://bigonukoduxa.weebly.com/uploads/1/3/2/7/132741189/4905355.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4460043/normal_60b45700f2f0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fcf5927c0e97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491673/normal_5fe5dc5de365a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411714/normal_5fd05f2cc70ac.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/6626533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458417/normal_60b86b437eb99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5feafe6f56b4b.pdfIn PDF document text
    • https://tapebosipufadiz.weebly.com/uploads/1/3/4/3/134366988/79aefb16b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_60271339b1c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484814/normal_5fe562453a382.pdfIn PDF document text
    • https://filavemegu.weebly.com/uploads/1/3/4/8/134883773/denakabisod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386849/normal_5fcfe606a43cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_6020590adb617.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/f483aa21-6c36-4465-8748-4a3a37dc913b/9899868292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/233959b5-f507-4ea4-8b9b-ff4022360cae/will_there_be_more_books_after_midnight_sun.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CC 5432 bytes
SHA-256: 39606dbf7c526f3ac365310cc04914687087fc44d432fe61387dd47006007064
font_01_sfnt_off0000e63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 10004 bytes
SHA-256: 387f1cb2a6ed1df93549788d1f4664d80161a8698f78ecf9afd66e963cc31479

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