Malicious PDF — malware analysis report

Static analysis result for SHA-256 c574e60ee823f9d1…

MALICIOUS

PDF

77.2 KB Created: 2021-02-28 02:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b2634683da4123860d79e835be4c2b41 SHA-1: 50dee99752e712d437d2f9ed237bb60304c15ce8 SHA-256: c574e60ee823f9d1eb4835e79a2940f285a5ca2d6139c44743a6c8172b6fc654
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. One of the embedded URLs, 'https://botokaw.ru/wb?keyword=samsung%20galaxy%20gt%20p3113ts%20forgot%20password', appears to be a lure to disguise the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wb?keyword=samsung%20galaxy%20gt%20p3113ts%20forgot%20password PDF link annotation
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/gamojom.pdfIn PDF document text
    • http://segway-wheelchair.ru/34400426249x2p6t.pdfIn PDF document text
    • http://rekopeza.22web.org/lord_of_the_flies_chapter_12_study_guide_quizlet.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/7159531.pdfIn PDF document text
    • https://pabaxugu.weebly.com/uploads/1/3/2/6/132695470/dekarez.pdfIn PDF document text
    • https://pukakanasosakum.weebly.com/uploads/1/3/5/3/135392678/dabosin.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/3169170.pdfIn PDF document text
    • http://vkysnaya-eda.site/sharp_microwave_oven_r357ek_reviewfayf8.pdfIn PDF document text
    • http://pressit.space/dd_5e_magic_items_list3digg.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/3507df4ac.pdfIn PDF document text
    • https://xoluvujotu.weebly.com/uploads/1/3/1/0/131070376/89325a829f5ba1c.pdfIn PDF document text
    • https://gojelubimutur.weebly.com/uploads/1/3/1/3/131384605/tifepo-jaredorojodoma.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/how_long_do_you_chant_nam_myoho_renge_kyo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sekijipaladi.epizy.com/scorched_earth_full_movie_free.pdfIn PDF document text
    • http://favukimasinete.rf.gd/xekifapasovodisisev.pdfIn PDF document text
    • http://koxosam.rf.gd/jetarajomuvawoxugefogi.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/best_data_structures_and_algorithms_course_for_interview.pdfIn PDF document text
    • http://jokosen.atwebpages.com/fundamentals_of_english_grammar_5th_edition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DB 5944 bytes
SHA-256: 1d90bd2b5e5e6c2bbf11ed3f9d987ae9ed57d2517ba4de5073bf874b3180fe53
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 15036 bytes
SHA-256: ab7bf415bf1f919f6aa7b035198258c492bdcb7ac5ffcfd742e77a65012d391a

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