Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c7070e59f337d1…

MALICIOUS

PDF

67.4 KB Created: 2020-12-05 10:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e535a2b5e4f3e09a11acf94380592d3f SHA-1: 91bf9fade79a2faa6256b6fc19d6a6670fa69822 SHA-256: c5c7070e59f337d1f1056bcda2f05fe1926987f9ebc6066ae5ca1143ea194927
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/123?utm_term=blade+runner+2049+streaming+uk PDF link annotation
    • https://demewegib.weebly.com/uploads/1/3/4/8/134867988/3570694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8bd6b4903a2.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/a15de33f-a58a-41ac-a550-0f9f68f580d3/25691551659.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc554acbd14ff0dd2ba05e0/t/5fc8eb734121f16d360d2a57/1607002996918/digital_nursing_school_planner.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/82749158604.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c48c104edf1d778017d3/t/5fc0f27f3f75b16643f6119e/1606480513062/zofopapoxogufixuzasuniro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff47da4-5320-4c73-ae70-27a55f124c3f/meleti.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27e6e3398ff7515381371/t/5fc6359e4e98326c02e4fec2/1606825376057/70093581180.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/14218513322.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc383e42cf09257bd7c65aa/t/5fc785095060c93fcd807019/1606911242724/27254913817.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bd3d39503a47f6f8a2a0/t/5fc8dc4e7ff5a343ebff986b/1606999118451/download_pop_star_hair_stylist_salon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fce4e11-c467-482b-8ecd-5d4f39e2f404/hl_90_blood_warmer_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de80dfe1-8655-4220-897c-82c8812c1306/volosobinezagobejosike.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_off0000ca09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA09 5776 bytes
SHA-256: 267ea8b0fb12e25bbc562b6b4e656f5c790a04ee0bad5a916df6b4402418841b
font_01_sfnt_off0000dda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA5 10428 bytes
SHA-256: e4bd528ba4b1871387fba9be3f8bb780f2cdee38c22188042682a0d2b341d893

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