Malicious PDF — malware analysis report

Static analysis result for SHA-256 4214b5f2755fe97e…

MALICIOUS

PDF

88.4 KB Created: 2021-03-11 07:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a27a91aa2403b7ce04bcbb16c22cd04c SHA-1: d25e94840a80f6634f69a912f7a3a5d9602d8f4c SHA-256: 4214b5f2755fe97e911ae036cd3eb0cc14b75fe2ab477c370dc00b8314a42fef
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/123?utm_term=forklift+certification+cards+template+free PDF link annotation
    • https://wutuzorul.weebly.com/uploads/1/3/5/9/135963099/4390593.pdfIn PDF document text
    • http://awpmode.com/jowulegozodosagofqqvnf.pdfIn PDF document text
    • http://8gusevshop.website/bible_quiz_in_tamil_with_answersu7v7f.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/ojbgegd/small_business_plan_outline_examples.pdfIn PDF document text
    • http://kismyketio.com/9216060989h2idm.pdfIn PDF document text
    • http://bioforce-co.site/smartcare_for_parentsrrltn.pdfIn PDF document text
    • http://amaryllis.space/the_canterville_ghost_summary_chapter_wise_questions_and_answersb0qyi.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/U5ibSi5/widaxiwotusidejoxanesagig.pdfIn PDF document text
    • https://xasamaxubema.weebly.com/uploads/1/3/5/3/135387487/b40cfead4faa266.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/10242704414cenx2.pdfIn PDF document text
    • http://gobigs.space/xutadapinunowal97ax.pdfIn PDF document text
    • https://cdn.sqhk.co/mowogibewu/X9NkodU/youtube_gacha_life_songs_playlist.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/xuromv11y6.pdfIn PDF document text
    • http://predouche.xyz/datazajifujonuwekekatadeiaje.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/jihaicF/hollywood_box_office_collection_wiki_2019.pdfIn PDF document text
    • http://devlp.club/pegaferarumazeb2mgra.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/sokefolumavak.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/samsung_vrt_front_load_washer_error_code_nd.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/bifajok.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/nijanopotulen.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001067e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067E 5320 bytes
SHA-256: 1d7a4abc59e635c8eb177044603fb1891add39bee894964fe016c344ed0d96cb
font_01_sfnt_off0001188c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188C 11252 bytes
SHA-256: c12298c56951ce244f3d5d77be218ca75adc6ddd051c8d4daf7abff64e18a1c0
font_02_sfnt_off00013eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ECA 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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