Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a306c347072fea…

MALICIOUS

PDF

64.4 KB Created: 2020-12-19 14:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b1ab291f43f63c24c4b4cd834d27410e SHA-1: bb4668830f6febba656291ef5a4ddabe1ca95c59 SHA-256: 46a306c347072fea67aeff40c281aecc142861484d7e6473d9a8949d5ba6f471
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of these links, https://trafffe.ru/aws?utm_term=amazfit+stratos+watch+faces++wfz, is flagged as unknown reputation and is likely malicious. The ClamAV detection and ML classifier further support the malicious nature of this PDF, suggesting it's a phishing or trojan distribution attempt.

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://trafffe.ru/aws?utm_term=amazfit+stratos+watch+faces++wfz PDF link annotation
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/jawox-mifugiton.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/7701122.pdfIn PDF document text
    • https://mizanupiw.weebly.com/uploads/1/3/4/2/134265802/cd42a.pdfIn PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/1030720.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/4e8813b9-489d-41e3-b0df-57f4dac34c1d/famovifopizagibibolefa.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/wniosek_do_ceidg_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6615903f-a369-468f-af7d-5ee0cfb7fd86/4677850427.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5329bb8467722f1eff083/t/5fc66ffc61e25426e115a3de/1606840317245/carson_city_dmv.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/922893491.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/ac_dc_thunderstruck_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015ed800-d015-4a5a-aaec-1fe28697ff76/nifono.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/an_old_form_of_poker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7ca725-152e-406c-b163-bc19dbec9302/1814539509.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/gewutagurulatejibelujosa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF1 5220 bytes
SHA-256: 832d70fd82fd347e2e4b8ad503878c5956869115fde2fedbc7f90f0845edb833
font_01_sfnt_off0000be9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9F 9628 bytes
SHA-256: bcdcb513e1beba33fe891422e682b73f8980c48df6140a1002aeab53a9c07aa9
font_02_sfnt_off0000dfac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAC 16096 bytes
SHA-256: 3bb08857b08983a257d5a2052628e18542fd51c8d29f5bbef87ea8b8ace00841

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