Malicious PDF — malware analysis report

Static analysis result for SHA-256 52dfbab1efd5a283…

MALICIOUS

PDF

78.0 KB Created: 2021-04-20 09:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5ca23f2aaa111303d609152dd105d8ca SHA-1: 99b611f85ed7adc081efa968578d9f3f9c1e0866 SHA-256: 52dfbab1efd5a28358410f780823362020b0e39037b901e160e2ac9511590856
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to cryptocurrency trading. The presence of embedded URLs and the ClamAV detection indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dafemum.ru/strik?utm_term=how+to+day+trade+cryptocurrency In PDF document text
    • https://wagetuve.weebly.com/uploads/1/3/5/3/135323282/vonaritatu-wodokuliki-godawosa.pdfIn PDF document text
    • https://zopojezumaze.weebly.com/uploads/1/3/1/6/131637354/bulosimaj.pdfIn PDF document text
    • http://steelsho1.club/what_foods_cook_well_in_an_air_fryerr4poq.pdfIn PDF document text
    • https://towuzisutodugo.weebly.com/uploads/1/3/0/9/130969847/861fa6b.pdfIn PDF document text
    • https://nawodovifuvobix.weebly.com/uploads/1/3/0/9/130969758/ebf8fc7bfd89f1.pdfIn PDF document text
    • http://polfact.site/63147076935mxi3w.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/1238761.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/polizanugifo-vixavidevarugo-nowemivosefak-jedesu.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/naxukalu.pdfIn PDF document text
    • http://13millions.store/6855799829gn6e0.pdfIn PDF document text
    • http://crystal-light33.ru/ketuzatekanabifidudubnnqm8.pdfIn PDF document text
    • http://madewithsunshine.com/310371323158pwvx.pdfIn PDF document text
    • https://jimiwijir.weebly.com/uploads/1/3/4/5/134525211/de9771a86f.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/jevelel/vuzumaliriganuxudumuvatid.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_fbe42aba34df4b9fb9af8b02a0f32c60.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/61425066777.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_88b427f5150f481cbe78bb69719cd783.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_48d8122bce784b26a38010daf52e1c01.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_12f274f28237465ca2309999c802b6a3.pdf?index=trueIn PDF document text
    • https://bbfcab69-cab0-43b8-b861-839d52945da6.filesusr.com/ugd/fa71eb_b460ed7f37654a9b9508806d7546f3bf.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_8d336047d82844b5a3c962ebd275083e.pdf?index=trueIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_1559d589ba014f58a804c5ddcfa16800.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/hampton_bay_remote_control_model_uc7083t.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/7268194126.pdfIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_394c9ab3946c4f79a41050b7872b74d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokixetat/81044757806.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_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 5012 bytes
SHA-256: 868a74d6881abaffcab44d1cf7859afb2224bbd9bde799be82d46bc55ec889fd
font_01_sfnt_off000103db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DB 11304 bytes
SHA-256: 1af58c108ca8311133760d527c44547a069f9e63adfe2bf79572e91bce64471b