Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7503dfef1c1c0ec…

MALICIOUS

PDF

76.4 KB Created: 2021-03-18 17:39:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 257f63dce8cfcd1cbd7014056895f379 SHA-1: 76aed3435917e51382441e659b5d14a320ca992e SHA-256: f7503dfef1c1c0ece6a433fe8e5038b2340874bd2fce0d998797def5f172f2e5
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, 'https://seumenha.ru/wix?keyword=mixpad+apk+download+for+pc', suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=mixpad+apk+download+for+pc
    • https://cdn.sqhk.co/xewumoxu/ihjehhj/80618439662.pdf
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/4024780.pdf
    • http://poguvezi.22web.org/castrol_5w40_edge.pdf
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/c46afd9.pdf
    • https://cdn.sqhk.co/sukonazukuv/fja42jh/dining_room_light_fixtures_rustic.pdf
    • https://cdn.sqhk.co/lagazowasobo/ihgjIld/top_hits_of_the_80s_by_year.pdf
    • http://ximuvitu.iblogger.org/76503066127.pdf
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/walanazugela.pdf
    • https://cdn.sqhk.co/kibutonap/d2rjejf/dasirupi.pdf
    • https://navikeput.weebly.com/uploads/1/3/4/7/134755574/60be93480d.pdf
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/fubipuvojeg.pdf
    • https://zulitaxovali.weebly.com/uploads/1/3/5/3/135351491/24f9b6.pdf
    • https://cdn.sqhk.co/varipivokil/OUegcaO/lekenufuripizodumum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://terezeso.epizy.com/how_to_develop_sense_of_humour.pdf
    • http://juvojifexuf.epizy.com/midiludulotifulo.pdf
    • http://bejovivijif.epizy.com/zopivivetulos.pdf
    • http://tosaxope.rf.gd/amanat_haji_hadi.pdf
    • http://libiriw.epizy.com/peter_and_wendy_disney_plus.pdf
    • http://sexikiti.epizy.com/greatest_strengths_and_weaknesses_interview_answers.pdf
    • http://mujigakevomo.epizy.com/binogaxolulufovudineg.pdf
    • http://fonaxipovun.epizy.com/82115487749.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7f.bin
46504de7295af035381812b6cd65dc6c1ad814110741022b58455ae68fdd28e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7F 5200 bytes
font_01_sfnt_off0000ff68.bin
14f0d757cbc8720f057bfedb10687baa9aef9b399b3c805820e26d3674916fc7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 10904 bytes