Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cfd1b5cb55f80d…

MALICIOUS

PDF

74.0 KB Created: 2021-03-31 00:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2db12eb060df30ede373bd65b938f19c SHA-1: 9aad82d83c157104d3b76d65c0d8bbbb74ae54bb SHA-256: f3cfd1b5cb55f80d1011dce4c6eb80b59b2a7fe81b4063106624a8d25b7c566c
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/award?keyword=cell+differentiation+in+plants+pdf PDF link annotation
    • https://cdn.sqhk.co/rifokinimito/7fiaxje/21655708867.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/hfijggC/youtube_nursery_rhymes_uk_little_baby_bum.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/kobivimelelo/nawonuro.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/film_architecture_101_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/nokixiwogotevodovod.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/what_is_the_punishment_for_prostitution_in_america.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/garukupo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/ruwejajerekewo.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/john_deere_tractor_lowest_price.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/autograph_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/excel_2013_vs_2016_compatibility.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/pudozasowid.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/azhage_azhage_tamil_audio_song.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/67429649727.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/samsung_smart_tv_remote_code_spectrum.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/mixed_number_fractions_worksheets_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/74841650191.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/dijuguwokira.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/jaxuwiwodupataweduzenugik.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/79127728710.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/29245505173.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/3250104126.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/44861881435.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/bilingual_aphasia_test.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_off0000e595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 4940 bytes
SHA-256: 3372dc67e415399721f631da14e5e4a51149d7f642c97fc7f9a551d79a98e2ae
font_01_sfnt_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 10544 bytes
SHA-256: 18ed390774cc2a554e1bde051c0ca3e9e240428cee4bbc2182f1e6b75af510f4

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