Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb25fe18a0ebc61…

MALICIOUS

PDF

79.1 KB Created: 2021-03-17 06:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bcfd8a38249e85e7cfff0bcc3b36b26b SHA-1: 16426ffc54a3108ce789e4c7f2d1efe718cb6155 SHA-256: 1cb25fe18a0ebc619e7e972a29b4d8899b24d33883158d3178a6eb7d9735e256
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external URIs, including one that directly links to a URL containing 'award' and a keyword search term, suggesting a lure. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the conclusion that this document is designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://xezojetit.ru/award?keyword=jolly+phonics+tricky+words+pdf PDF link annotation
    • http://zujewap.mygamesonline.org/alzheimer_s_disease_2020.pdfIn PDF document text
    • http://50offstore.pro/d-link_dir-601-a1_firmware1iikt.pdfIn PDF document text
    • http://dimax.website/beziwitedifuvokeoer2j.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/50253511564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_5fe259613b4b5.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/kivowikusugudagubalug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444636/normal_601a390857525.pdfIn PDF document text
    • http://aduo5.online/midi_to_xlr_converterpehpj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_602d5a39ca8f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_603eb47d82fd7.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/10137631421.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/advantages_and_disadvantages_of_technology_in_society.pdfIn PDF document text
    • http://copyright-infringement.business/jigaze1ipis.pdfIn PDF document text
    • http://mazikopipovix.mywebcommunity.org/66546506230.pdfIn PDF document text
    • http://toxusuzom.mypressonline.com/high_level_vocabulary_words_for_ielts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_602ebfc4acf46.pdfIn PDF document text
    • http://firstreadersclub.com/best_ad_blocker_android_samsung9qnrc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412573/normal_603a3eb899e57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390381/normal_6039d6262e496.pdfIn PDF document text
    • http://tradestaroffice.com/how_to_mix_fuel_for_leaf_blowerjz8ze.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/psychological_trauma_assessment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6033f189842a6.pdfIn PDF document text
    • http://shop-onlinediscount.xyz/80570420015y5ekh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 5280 bytes
SHA-256: 0af519f5315a6cda201cf4792532fe690915aba5cd5f5d25c05a52828eac1af4
font_01_sfnt_off00010a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A61 10720 bytes
SHA-256: a85a4ce69625419cacf901baecac030a86cc96ea3bb48e63950dc7ec272c1ed0

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