Malicious PDF — malware analysis report

Static analysis result for SHA-256 33540023f6f72e5c…

MALICIOUS

PDF

82.8 KB Created: 2020-12-14 02:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9e6f2a4ac4d7704c6efa0878ff352ff9 SHA-1: b6f851e43afeb52d2059f149ddb6402026eb5189 SHA-256: 33540023f6f72e5cdd248c2a6660b598e78cd53c4e281e1c70d739a6b7531411
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical alert for linking to a known malicious redirector and a high-confidence ML classification. The document contains a link farm of 30 PDF files, many of which are hosted on disposable domains, suggesting an attempt to distribute malware or phish for credentials. While no scripts were explicitly extracted, the presence of malicious links and the overall structure strongly indicate a phishing or malware distribution campaign.

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://traffmen.ru/123?utm_term=gangstar+rio+apk+free+download In PDF document text
    • https://rewazifepa.weebly.com/uploads/1/3/4/6/134664269/xuxezuxanomapiwa.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/gibebaxarar.pdfIn PDF document text
    • https://duxobibalarig.weebly.com/uploads/1/3/4/3/134360367/zabizizinubeba-mawik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5fc7554770894.pdfIn PDF document text
    • https://wasinipexo.weebly.com/uploads/1/3/4/3/134362371/4745602.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_5fc26792cb0fc.pdfIn PDF document text
    • https://lopinelu.weebly.com/uploads/1/3/4/3/134369173/1ccc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5faae3ba4c407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fbb9f5d11e9e.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/5fbce344be7cfc36344e8aaf/t/5fbe15c461e25426e10107ff/1606292932935/tevafoxu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf258bc0575613efdd3a6a/t/5fd1518d273c8f5542a66d16/1607553422878/wild_wolf_simulator_3d_apk_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc170ae085bf90c0e00e766/t/5fc93e8f84f7d95cdc78f2f4/1607024271249/mufumolatuvo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4e8b0ee49e251fe79f0b/t/5fd11081f5bc2a01983fe7ca/1607536773095/90820547600.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6806ca3bf4b14abcfadcf/t/5fce7d6af0d75a07551ce6b1/1607368042960/16379864684.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00010e7f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10E7F 27440 bytes
SHA-256: 0791ff1f5290747e93c372cd259eaa79d6d723037ff51cdabbb8c97ba42b9afc
font_00_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 5396 bytes
SHA-256: 6233c6d9653e3a6f62c34d242dfba63061f84e0ff184da8fa8c38a9e1348c8d7
font_01_sfnt_off0000eb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6E 10332 bytes
SHA-256: 8a3659ad38164bde693ba220de5493e0a00381d6d1e0e1cb9b1b6df749119043

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