Malicious PDF — malware analysis report

Static analysis result for SHA-256 f357d24f0d7646d4…

MALICIOUS

PDF

89.0 KB Created: 2021-03-14 16:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee3ecc28078ce3ec64bdb96a1e1914d2 SHA-1: f385738e1e3e2c1f31f5c95fa831f7242a2e1792 SHA-256: f357d24f0d7646d443db8d49ad53470106c59abb91436fcadd788710dffe0967
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a high-risk phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a deceptive lure, likely attempting to trick the user into visiting the malicious URL for a fake download or information. No scripts were extracted, but the presence of malicious URLs and the overall detection profile point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/123?utm_term=bidirectional+uniform+cost+search+python
    • http://santand-es.com/70804312713e38dp.pdf
    • http://uscarins.info/badrinath_ki_dulhania_movie_status_videoxng3f.pdf
    • http://zabavnyi-slon.ru/zutaxixujerazujoxilapovao3nqa.pdf
    • https://cdn.sqhk.co/gomurabog/j2bawjd/64842152100.pdf
    • http://fb-pageunderreview.com/pepatovakutajenolifonij87htq.pdf
    • https://cdn.sqhk.co/xusozapovu/ifhhbid/tonadexorasokevexav.pdf
    • http://easybranding.org/libupajejxli2m.pdf
    • http://straponartist.com/download_oracle_java_8_ubuntu_16.04y5yja.pdf
    • https://cdn-cms.f-static.net/uploads/4420743/normal_60431800627e2.pdf
    • http://feedbacrnz.space/85318635845nn6i6.pdf
    • https://static.s123-cdn-static.com/uploads/4404488/normal_5ff039ace7f84.pdf
    • https://cdn-cms.f-static.net/uploads/4378855/normal_6023eca750048.pdf
    • https://cdn.sqhk.co/gusisezepemu/ldjckIe/prop_hunt_fortnite.pdf
    • http://naturebiolog.fun/what_is_the_meaning_and_example_of_literary_nonfictionnzcq4.pdf
    • http://islandlandscapesbb.com/inpixio_photo_maximizer_pro_free_downloadohk83.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://14da0a27-f261-4d4b-8668-3a369f5c966d.filesusr.com/ugd/46429b_6fca497844104de0b202546f27fb9da0.pdf?index=true
    • https://s3.amazonaws.com/gudukupir/marketing_management_by_philip_kotler_13th_edition_free_download.pdf
    • https://s3.amazonaws.com/doxifuba/zinuwinetumoregifazij.pdf
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_f4abf72dfca24292b873c1463cf47065.pdf?index=true
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_8aa675ccae38485b9d8aebdefec08610.pdf?index=true
    • https://s3.amazonaws.com/xupizewuxere/beauty_and_the_beast_disney_song.pdf
    • https://s3.amazonaws.com/sefukirexuwekij/mibivepaserabatujibebafof.pdf
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_e33ad1617b7f4aeca70348fa7333f77a.pdf?index=true
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_ee5bf3b422074f0b9ffbd79368e42fe2.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e88.bin
7f93e59acb2848b4c638e7e800247dfe0fa73aed4992c9fdc81e65eb9b30ddc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E88 5544 bytes
font_01_sfnt_off00013140.bin
ef76cb7d8d8ab50a454b3b1d50a3872bef49abc9bfe80454e7d9f0ccf1157461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13140 10764 bytes

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