Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e49b8da1802186…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 05:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef92be30a162473be282da1748d7838d SHA-1: b9268fa1fd0e6137425334a2008ca9600ecf6be7 SHA-256: c0e49b8da180218647c127aa2647bed7e34965232d6d742c871340f3764e2fcd
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to PDF files hosted on cloud storage services, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://lozipotod.ru/award?keyword=dictionary+merriam+webster+pdf', is directly embedded and likely serves as the primary lure. While no scripts were explicitly extracted, the PDF structure and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://lozipotod.ru/award?keyword=dictionary+merriam+webster+pdf
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/9492956.pdf
    • https://cdn.sqhk.co/wibezudak/xSajaib/soputudivozoroveru.pdf
    • https://megogira.weebly.com/uploads/1/3/4/5/134590171/9204090.pdf
    • https://cdn.sqhk.co/tudusiki/chdxwOG/journaux_algeriens_sportifs.pdf
    • https://cdn.sqhk.co/vejuwipem/jiijoF0/vewaduxa.pdf
    • https://jijiwunidagaba.weebly.com/uploads/1/3/5/9/135964504/rutuvope-lalalewax.pdf
    • http://tinaxugamonow.22web.org/how_do_you_know_when_green_onions_are_ready_to_harvest.pdf
    • https://cdn.sqhk.co/rinugezig/jfjaIji/play_poker_offline_pc.pdf
    • https://cdn.sqhk.co/xugiwatokax/WKTusie/bosezagi.pdf
    • https://cdn.sqhk.co/zafazegig/jigBlgi/fariruvunofog.pdf
    • https://cdn.sqhk.co/susiwebuvowo/Rijvibv/37842563981.pdf
    • https://cdn.sqhk.co/logubaxe/iNjj5jd/best_small_fold_up_treadmill.pdf
    • https://cdn.sqhk.co/mowasikuso/hsYhipj/44788696660.pdf
    • https://vivesajepud.weebly.com/uploads/1/3/0/9/130969004/zopejenasuwuzew_sotuwo.pdf
    • https://cdn.sqhk.co/bujomukoda/ejjMieV/nbc_sports_gold_price_nhl.pdf
    • https://cdn.sqhk.co/janurisu/jjBhgjh/cruise_lines_stock_price.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jukoxisojow/kakipagafanipeferutubi.pdf
    • https://s3.amazonaws.com/kotodur/93450844019.pdf
    • http://tufozule.rf.gd/valentine_day_ki_date_sheet_2019.pdf
    • http://bavidoripo.epizy.com/adjective_clauses_esl.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/ideal_gas_law_worksheet_answers_instructional_fair.pdf
    • https://s3.amazonaws.com/jinabom/php_composer_autoload_performance.pdf
    • http://tanepomi.rf.gd/datepicker_date_format_javascript.pdf
    • http://tepaduvofevog.rf.gd/xusuwatumibelepojavami.pdf
    • https://s3.amazonaws.com/sepovutapakogaf/mixisemajerosusodixupi.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f387.bin
af713b5ae560f7b8b99a0ee318180dbe428abab0a175866ff726c5d05fa8d7a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 3316 bytes
font_01_sfnt_off0000ff52.bin
4f821850c922cc73a2a513a671ee913f48165f45ad14e4f5594d4d985b2e34f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 5600 bytes
font_02_sfnt_off0001125e.bin
369691a0d3082255678cc013dcae9896b0fd156415daf24e14a97aa95f0b52ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125E 12412 bytes

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