Malicious PDF — malware analysis report

Static analysis result for SHA-256 3206cb9fb01715ae…

MALICIOUS

PDF

89.3 KB Created: 2021-05-05 18:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 030ee8fc13dbf74e06d3c5add349e4ca SHA-1: 0427e8b8d3b1a3cddad9bd0ce9025b2651b668ed SHA-256: 3206cb9fb01715ae08c786a29ea7e3f3f795e7837bb973be440a7f707bacd842
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to unknown or potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards it being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://romeita.space/munchkin_epic_ruless12di.pdf In PDF document text
    • https://cdn.sqhk.co/gefeloxo/A0sgiig/fajipokanijujogomarodefa.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/br0hcja/the_voice_coach_winner_australia_2018_knockouts.pdfIn PDF document text
    • http://plafond.xyz/mowir74n79.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/eijFCbr/alien_zone_raid_mod_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/5AppgdZ/mtg_war_of_the_spark_draft_strategy.pdfIn PDF document text
    • http://lishop.site/ielts_reading_test_vkvsvan.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/DOhhwhe/best_wallpapers_for_iphone_5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/4NO0L8wlyOA/wb?keyword=trig%20rules%20for%20right%20trianglesPDF link annotation
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_984a0f4d81274c82aabbc386fab45ebf.pdf?index=trueIn PDF document text
    • https://673fcb93-492a-40d1-a7cc-77260b5c7816.filesusr.com/ugd/62d21a_05ca25eb8e7c43069716b86ff434c8ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/seiko_quartz_chronograph_7a38_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/kuwuwezema.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_d4e80afc4a59422a98fd0d7dad5d8c67.pdf?index=trueIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_d748d4192c7c4c8e945cecdc46d85a7c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/dark_chocolate_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/convert_to_kindle_book_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/wusamoponusunerekuvobon.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/bu_jhansi_admission_online_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/alteraciones_leucocitarias.pdfIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_ee4e5b4c6e1d4e119173b75fbfa4f1e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/turusu.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_off00011d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D01 4976 bytes
SHA-256: 9efdb3aa966a8223a9088d57d96abba0c3710d84f8b9a15893530f41e595df3e
font_01_sfnt_off00012de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE5 12568 bytes
SHA-256: dc40a93a8f8a166a595aa423213e578113d1d97e27983ae553b00ed6ea034c78

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