Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44ebb2128e2bcbe…

MALICIOUS

PDF

77.7 KB Created: 2021-02-25 08:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3e44b36787806a3b1b0564ae7a1dd49c SHA-1: a64183712f55bd6865febd07bcdbae0426e3517e SHA-256: d44ebb2128e2bcbeae5e385f97b49c01c0df1528300cbd54996944ab6799623d
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain search-related terms, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+remove+moen+faucet+aerator+that+is+stuck In PDF document text
    • http://xitabijasava.getenjoyment.net/lean_management_system_certification.pdfIn PDF document text
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/vadizaladatipuvare.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/sitasosira_wolerebazexetop_zatifemufu_widawado.pdfIn PDF document text
    • http://romeita.space/16136163436x1baq.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/gagetopurefepulo.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/65147667065.pdfIn PDF document text
    • http://josogub.iblogger.org/apk_2gb_ram_booster.pdfIn PDF document text
    • http://kmplitka.shop/29084181523vuqcm.pdfIn PDF document text
    • http://rte-ita.fun/glioblastoma_multiforme_cancerw8gjo.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/1632328.pdfIn PDF document text
    • http://dreabling.online/45793282078ylfs8.pdfIn PDF document text
    • https://bekujorukop.weebly.com/uploads/1/3/4/0/134016765/260f8825cb.pdfIn PDF document text
    • https://vidixudex.weebly.com/uploads/1/3/4/7/134774160/jivorigofulino.pdfIn PDF document text
    • http://supernefritroller.xyz/38741382697ln500.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/acido_nitrico_estructura_quimica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovawawopo.rf.gd/tafun.pdfIn PDF document text
    • http://somizifiwij.epizy.com/ajay_atul_ganpati_song.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/kopeko.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_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 5268 bytes
SHA-256: b6069c626793ac531b4ad51eb806f7d6e99d7ba492dafdbe654fb09f4967783e
font_01_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 10520 bytes
SHA-256: 7e5e09781f5bf2a43df240704c8691b59e9b27b2b2c43393b3fd4a919c509cbc
font_02_sfnt_off0001147b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147B 16060 bytes
SHA-256: dea42a645509e47913d94a3c1ff2e7ffecf6ca7e8d06e08a5f86f932263db97d

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