Malicious PDF — malware analysis report

Static analysis result for SHA-256 806690775bbd881a…

MALICIOUS

PDF

74.9 KB Created: 2021-02-23 12:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 16dc4a14c3b3f5de586bc23cd5c5a5b6 SHA-1: ae8da4532c64b924e3cc139465108832206b11ef SHA-256: 806690775bbd881a591432413c5086532db6a058e07b9d60b612fb8bcf59b3e1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL pointing to a search result for 'Stihl fs 460 brush cutter price'. This suggests a phishing or scam attempt to lure users to malicious sites. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing document designed to exploit user interest in product pricing.

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://maypoin.ru/strik?utm_term=stihl+fs+460+brush+cutter+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5fec875bac932.pdfIn PDF document text
    • https://gibejuta.weebly.com/uploads/1/3/0/7/130776113/nejekifonurane_fupewesije_josisukusubuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5ff7967f45c55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5fcb5af3c9a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392868/normal_5fff6e7553fdd.pdfIn PDF document text
    • https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/wofogozivonolesud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601db6eef30a7.pdfIn PDF document text
    • https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/9246496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_602c6faaac4c8.pdfIn PDF document text
    • https://xizimojagetotom.weebly.com/uploads/1/3/3/9/133997363/6660055.pdfIn PDF document text
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/bisinupuko_jiriwogab.pdfIn PDF document text
    • http://rarebuzoxexovom.22web.org/vozovadodinejeker.pdfIn PDF document text
    • https://golisarupu.weebly.com/uploads/1/3/5/3/135317681/zobipimo_bisim_firidozoja.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/3bf67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE417 5520 bytes
SHA-256: 696c7dcd46da541fd738620f3a3f8f23dfb6e33c481dc7e11de3730c11590170
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 11568 bytes
SHA-256: ce8d1db2454d7a9d52b143139ca7e4e25998fcd300cdc643a7f610d8fdebc7ad

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