Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b143cc224854445…

MALICIOUS

PDF

79.6 KB Created: 2021-02-19 07:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41e5fb11f625d56c3b6b4f1e7dc8588d SHA-1: 5baa6ca9bfd82031c16a73a192cf0068af3cc321 SHA-256: 9b143cc224854445676a43b6d4facfebb20005ff9ff2ef533ce8d5b221fcda7c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the ML classification strongly support its classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/wix?keyword=shadow+freddy+gacha+life PDF link annotation
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/9646191.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/4697559.pdfIn PDF document text
    • https://cdn.sqhk.co/purizepore/jigdjfI/adventures_of_mana_vita_gameplay.pdfIn PDF document text
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/xelovisab.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/jdFihis/candy_grabber_mini_claw_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/QephgyM/cut_the_rope_experiments_5-_25.pdfIn PDF document text
    • https://dimomivij.weebly.com/uploads/1/3/4/5/134504604/9068516.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/7idgfYD/lanosobowu.pdfIn PDF document text
    • http://beruvutekimeged.22web.org/39417839860.pdfIn PDF document text
    • https://moganuvutixeku.weebly.com/uploads/1/3/1/1/131163890/774e046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rozazidugo.epizy.com/negepa.pdfIn PDF document text
    • http://lobulowigewimu.epizy.com/48673252705.pdfIn PDF document text
    • http://betetedapunu.epizy.com/612965708.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/dojepiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/wizipagukovovadolizojug.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/ditozoruju.pdfIn PDF document text
    • http://wotawegij.rf.gd/togumetaje.pdfIn PDF document text
    • http://gefafeduvul.epizy.com/word_cookies_2_coffee_10_answers.pdfIn PDF document text
    • http://nuforikoxiv.epizy.com/lowipopuxenizosude.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/angina_nice_guidelines_diagnosis.pdfIn PDF document text
    • http://lamiredej.epizy.com/fetawanuwadutat.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04A 5404 bytes
SHA-256: 55b0b59c2bf3043580abd2d92af551423d8c1ba9a12440e6e4f1f49e46ff4393
font_01_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 1860 bytes
SHA-256: 8abe30b9993ee33bfcd45ad2c12551479fe7237befddd135ea8f17f22e823938
font_02_sfnt_off00010bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB5 10464 bytes
SHA-256: 7f794bb10f7e7aa33cefb2d761368f022ed0f7f89f67da5ad41ddc9eb6165e23

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