Malicious PDF — malware analysis report

Static analysis result for SHA-256 00324bdedea9b823…

MALICIOUS

PDF

81.6 KB Created: 2021-03-19 06:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 22928439ad00b5b27e0a7982021d5556 SHA-1: 9e5fb00bbc59e0b8cc6cd1bbe1be1ecbf9f667a9 SHA-256: 00324bdedea9b823bb4482df7198db94036c9ce61d2f68fea82c3f5acb9cfb48
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 SEO-optimized to appear as legitimate search results. One prominent URL, 'https://baarspo.ru/wix?keyword=city+of+ember+unit+pdf', suggests a phishing or scam attempt by impersonating a search result. The presence of embedded URLs and the ML classifier's high confidence score further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 https://baarspo.ru/wix?keyword=city+of+ember+unit+pdf PDF link annotation
    • http://yogist.fun/star_trek_next_generation_cast_season_5_episode_21fwszc.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/tgchahf/iphone_xs_max_stock_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/gfaDigx/cara_merge_shape_di_power_point_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/lYKP7gh/julonalu.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/how_to_program_a_chamberlain_universal_remote_control.pdfIn PDF document text
    • https://cdn.sqhk.co/miseseren/ZwjjQhb/lecture_notes_in_spanish_translate.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/gjghaij/siren_head_sound_effects.pdfIn PDF document text
    • http://serawuv.mygamesonline.org/allegiant_book_free.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/z-table_normal_distribution.pdfIn PDF document text
    • http://fortuneo-enligne.com/successful_writing_at_work_concise_4th_edition6vki1.pdfIn PDF document text
    • http://kinokaiff.space/what_is_a_polar_protic_solventy83p8.pdfIn PDF document text
    • http://help-copyrightservice.xyz/14509776607xfwve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_98c2719de9844524b487213760647afb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/26405028273.pdfIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_bc6f6e58acab44ccadac237f7bc3f21c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/84971713944.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/rajapujajolu.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/honda_6500_generator_manual.pdfIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_9a819c5f9ae24c40a928dece90c6bb5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/presentation_outline_template.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/bepojujakoviloku.pdfIn PDF document text
    • https://2571d5ef-7130-409a-b87d-c3fd18a83f30.filesusr.com/ugd/71fc55_2546574bb31546d794386d3a53ed5b1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/59822936229.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 4916 bytes
SHA-256: 993ea38a546fa0a75cd7fb3dc27d5caa1572c42a007b7dc76562ab5fb6cf3f55
font_01_sfnt_off0001062b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062B 10984 bytes
SHA-256: 6d19d195f377b9bc0cffda6c031cd28b69705c495aff2b4b4b4a644b25aed054
font_02_sfnt_off00012b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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