Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cc4903339b6f26…

MALICIOUS

PDF

82.3 KB Created: 2021-05-03 14:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ea1f7519c3ce59b56001661d93a87c6f SHA-1: bbc02f6f18ca4ba2dd731ba0b21a523b56e1d312 SHA-256: 53cc4903339b6f2639bde5b4f20cf7189a5f9e32954f1f84b4b2059e1e4720c5
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent URL pointing to 'mezovuduw.ru', suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support the conclusion that this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=refurbished+herman+miller+aeron+classic+mesh+chair PDF link annotation
    • http://mupoxebetofe.iblogger.org/how_to_teach_compound_complex_sentences.pdfIn PDF document text
    • https://cdn.sqhk.co/jiwosowo/c2hfhcq/medieval_family_life_facts.pdfIn PDF document text
    • http://waxawazurutane.22web.org/60698147304.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/angel_eyes_korean_drama_ost.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/fibcBJ5/silicone_baby_food_freezer_tray_with_lid.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/ghcwEWO/62716532327.pdfIn PDF document text
    • https://cdn.sqhk.co/ludukuni/dCjhhbE/sticker_studio_sticker_maker_para_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/ijuGLJc/tibaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/the_other_side_of_heaven_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/bedsheet_meaning_sentence.pdfIn PDF document text
    • https://8ecf7690-1f99-4e28-a4b6-3228ba9731d7.filesusr.com/ugd/63d3ad_76a568020cde4bdc9fdbddb9320ff4ad.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_7055e590abfc44d4b07f345f8c3e13c8.pdf?index=trueIn PDF document text
    • http://fazegixedibuw.rf.gd/63774104653.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/parent_functions_and_transformations_activity.pdfIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_77aecef7cca24fde8886d078b54dfdf3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/build_our_machine_sheet_music.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_086e2661e5b24b8abd534b491f35b1fa.pdf?index=trueIn PDF document text
    • http://vutevesofu.rf.gd/causal_comparative_research_design.pdfIn PDF document text
    • http://jolafefiluw.rf.gd/94004751807.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/duluwokavavatigi.pdfIn PDF document text
    • http://pigasupozev.epizy.com/tuwenejodiv.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/83158505625.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_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 5212 bytes
SHA-256: 958af401503496a062e7719d826fef10a9d9542985979ce4075682f15ad57054
font_01_sfnt_off0001039e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039E 11972 bytes
SHA-256: 09c4a044a7fd473d1029bfc7d304a63b2f84463fa184be91262869e6d77f01f1
font_02_sfnt_off00012ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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