Malicious PDF — malware analysis report

Static analysis result for SHA-256 078c666584153efb…

MALICIOUS

PDF

83.7 KB Created: 2021-02-23 06:18:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 9f75dccf770031628cfbcb9dbbff67e5 SHA-1: e813fdc459a6b9b246c3b6ec5d8babef7506b2af SHA-256: 078c666584153efbdab4d7b05846ef5627b1f071599522c375dcc3945e2f7b1e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://maypoin.ru/strik?utm_term=how+to+install+a+washing+machine+box', is directly embedded and likely leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or a scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=how+to+install+a+washing+machine+box PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5fca05a1d6abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5fe9b6de6af30.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/fozubudibov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_6028f90ac982c.pdfIn PDF document text
    • https://gugeropufil.weebly.com/uploads/1/3/0/8/130874104/katodata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484815/normal_5fc5edc0e645d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_601effc735eb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384295/normal_60011fa5108be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490735/normal_60270ba901c47.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/sepawi/formal_shops_brisbane_valley.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/fojibiwubowosinu.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/kopepezezirunej.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_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5380 bytes
SHA-256: ef147464d438da85e62e193fdd2f4b09b2fe27c2068d0c07fb8b368d31fd082a
font_01_sfnt_off00010831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10831 10728 bytes
SHA-256: b9a166afa2d676f89bf8494d779452cdc14986db782d9ab7d40dc0ac01a83465
font_02_sfnt_off00012cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD2 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f

Open this report in the interactive analyzer, or submit your own file for analysis.