Malicious PDF — malware analysis report

Static analysis result for SHA-256 467ab2bfa2e8d97e…

MALICIOUS

PDF

86.6 KB Created: 2021-03-29 17:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 90ba77ee20d1076116d2150e3bf29465 SHA-1: 36b88683fef0f4871a09e6f244015b0f6cbb6ca9 SHA-256: 467ab2bfa2e8d97ef1160c80ab56ad58a32a4908cc251b8e2ff8079aa60fb008
104 Risk Score

Malware Insights

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

The PDF contains a lure for a "hack tool" and embeds a link to a suspicious domain, indicating a phishing or malware distribution attempt. The PDF also contains a large number of external links, many of which point to benign content, suggesting a link farm or SEO poisoning tactic to disguise malicious intent. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://midufefew.ru/wix?keyword=activation+code+for+choices+hack+tool PDF link annotation
    • https://cdn.sqhk.co/vekosozob/iiwUIgg/calendar_october_2020_to_september_2021_printable.pdfIn PDF document text
    • http://losmopaka.site/schools_of_buddhismn3k47.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/fiemms0/chocolate_and_marshmallow_cornflake_cakes.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/g6Ua1ie/butter_pound_cake_recipe_with_cream_cheese.pdfIn PDF document text
    • http://trackcreditscore.info/fifty_shades_of_grey_book_synopsisaf7va.pdfIn PDF document text
    • http://nowatora.22web.org/corel_draw_x6_official_guide.pdfIn PDF document text
    • http://formblckr1.xyz/geometry_dash_meltdown_levels_4-_6hlenw.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/sawerugidizukexi.pdfIn PDF document text
    • http://mon-cmbretagne.com/dojemegojerajbk0pc.pdfIn PDF document text
    • https://gafanobekifin.weebly.com/uploads/1/3/4/7/134768645/nanan.pdfIn PDF document text
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/turikomufile_viluzasevetabun_zevudak.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/detepisax.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/pobixedele/coroners_court_reports_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/android_studio_anim_xml.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/how_to_reboot_moto_g6_play.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/how_do_you_make_a_simple_trifle.pdfIn PDF document text
    • http://nasewuji.epizy.com/tezisuporubikapaxibe.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/messenger_video_call_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/amazon_video_apk_nvidia_shield.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/tetaledilofimaki.pdfIn PDF document text
    • http://mafonoxerinomif.epizy.com/matrices_word_problems_worksheet_with_answers.pdfIn PDF document text
    • http://losalevova.epizy.com/95662759854.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_off0000ffde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 5224 bytes
SHA-256: deb0b8c14cd03223db46b8d0f4e70b678c12ae079ea63f5c6de3be8a63de0bbe
font_01_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 11084 bytes
SHA-256: fc4d7ae82efb56ab573b868b0015150dcdb1496e858c2ececca019d90db9b792
font_02_sfnt_off00013773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13773 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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