Malicious PDF — malware analysis report

Static analysis result for SHA-256 600f9d9b53924b73…

MALICIOUS

PDF

81.2 KB Created: 2021-01-24 02:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f8b51abdd171377644804b50de7ac222 SHA-1: 9d7ebed8c920b5833291bca18d9bf53a8fbde564 SHA-256: 600f9d9b53924b7368c1443a68773828fddf94abb0382ee66e2f09009fadb2af
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to S3 buckets and other domains, suggesting a link farm or distribution mechanism. One of the primary external links, https://baarspo.ru/aws?utm_term=conflict+resolution+procedure+template, is likely the intended destination for users, possibly to deliver a second-stage payload or conduct phishing.

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://baarspo.ru/aws?utm_term=conflict+resolution+procedure+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485570/normal_5ffa922c11e13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5fe402af269c7.pdfIn PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/94c2596fd57.pdfIn PDF document text
    • https://sejusidanixaj.weebly.com/uploads/1/3/4/3/134374441/lotixuzar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455660/normal_5ffe1a005e961.pdfIn PDF document text
    • https://lekemevegov.weebly.com/uploads/1/3/1/4/131410090/pazufesodun_regamen_bujireke_kumubozabekeva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fe099a41520a.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/6586822.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/3944738.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/demejifejopam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374843/normal_5ff2c0472fd2e.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/tigewibejageju/88951005603.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/12375177366.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/9068750002.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/ronebekusivakakeva.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/jobsplus_malta_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/rosoro.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/zememilapobejubuduwuxural.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_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 5208 bytes
SHA-256: 548ebe25fcf01c19c39b7f77eec2adc5a8de2640dd220e4d4d5de339efdcb2b6
font_01_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 11220 bytes
SHA-256: 736afc6ee8d5ed7147db7e98a162c2916ec65e72df48b370245378532c7b7452

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