Malicious PDF — malware analysis report

Static analysis result for SHA-256 71216a0f347c48ea…

MALICIOUS

PDF

66.7 KB Created: 2021-03-15 18:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: fb0c3b4f12a0d7f21588b67210dff116 SHA-1: b63e160cc4b0339ff3f6c32d6c25c9a20352dfa3 SHA-256: 71216a0f347c48ea87e9ec3746703b630f06af1ef0399889c570df96a13f2171
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, https://ponafet.ru/wb?keyword=genie%201000%20red%20light%20blinking, indicates a potential lure related to product searches. No scripts were extracted, but the PDF structure and link farm behavior are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/wb?keyword=genie%201000%20red%20light%20blinking PDF link annotation
    • https://cdn.sqhk.co/bavisimupux/BNgfhgD/29760885659.pdfIn PDF document text
    • https://cdn.sqhk.co/diratukuz/ihgehfG/27481732877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_602069c3358e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_601ebf92e30ab.pdfIn PDF document text
    • http://keruxiwu.22web.org/musgrave_public_finance_in_theory_and_practice.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/gjagjKA/fowujevobis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5ff324bdb4a72.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawomo/wgg0Ohd/45364460765.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_5540448c46a54e9c858cba6311c369ab.pdf?index=trueIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_531c0ce151334781b0f92583fed2cdff.pdf?index=trueIn PDF document text
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_dbf349f0223942dab3a2df417306adcb.pdf?index=trueIn PDF document text
    • http://tofezigiserix.rf.gd/international_marketing_process.pdfIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_75f4c0185cd74bed8cf7e25204485b18.pdf?index=trueIn PDF document text
    • http://tenisofirurefed.rf.gd/47566450513.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_dfd9149664b4431081644694abbdbba5.pdf?index=trueIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_76a37e8880ab4f6c955e8f2b5b165429.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_d542e47d6f9147aa83b2b56588ac552d.pdf?index=trueIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_80c2929ecaf0479d82e08aefdf13505c.pdf?index=trueIn PDF document text
    • https://5e446c31-fcb6-4427-a178-91ee45bbff8b.filesusr.com/ugd/4e76b8_bd00d1d731bf4b78be9c19442b3a0c88.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_f0f2d018b563422b85f270944c3efbaa.pdf?index=trueIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_10ae351fba444a0f804ed1fcae78ce6b.pdf?index=trueIn 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_off0000c845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC845 5128 bytes
SHA-256: 0e8a1751e2c3d83a0cf4bec4f999ac21753edfa84d9f2e0ccecefb5e3e6ee078
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 11132 bytes
SHA-256: 81cb253064bb009e51692909d29cf0821a057c6074d626c6c8dee8f117166858