Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7d0cf6ab0cb9a52…

MALICIOUS

PDF

97.8 KB Created: 2021-03-03 16:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f5f80d4d67d1ba157f6bcc74ccb3eadb SHA-1: e29fb4cc4f05c7c2daead51b172af0f3d030289f SHA-256: e7d0cf6ab0cb9a52f4042bb032405e517a84dfeadf0aea8fb030be14c0e0fc8a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://baarspo.ru/strik?utm_term=how+to+train+your+dragon+new+series+2021', suggest a phishing or malware distribution lure disguised as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+train+your+dragon+new+series+2021 PDF link annotation
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/3488759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387240/normal_6006717c2cd49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fdabee2c789a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5ffe431900420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_602d9fd1461c7.pdfIn PDF document text
    • http://feedbacrnz.space/womanugetidcon7.pdfIn PDF document text
    • http://thailandlove.site/31450352253magp5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_60060fadcc871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367277/normal_5fe39fca40409.pdfIn PDF document text
    • https://safamitiwifiro.weebly.com/uploads/1/3/0/7/130739579/puzafab.pdfIn PDF document text
    • https://femowoziso.weebly.com/uploads/1/3/1/3/131398515/5354126.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/vomafajer.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/fanadadutax-kurojagesotila-zezuz-nefufutaruke.pdfIn PDF document text
    • http://redita.fun/20255325311xgxo2.pdfIn PDF document text
    • http://watasanu.iblogger.org/46158381249.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zepibugab.rf.gd/86896173205.pdfIn PDF document text
    • http://risuzapusujafeg.rf.gd/is_hp_envy_4500_inkjet_or_laser.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/gejanabevuva.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_off00013ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED6 5444 bytes
SHA-256: 29e4ad905a41c0e832c1be69bab10dcc9199fc4eeefca8788ed333fe168a061d
font_01_sfnt_off00015185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15185 11944 bytes
SHA-256: 4f86f5a27f19589c1f4ebeb954a0eebdbf3de9469608ad9e0ccac8ca4a6e6c8f

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