Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c0a594a539bde0…

MALICIOUS

PDF

76.5 KB Created: 2021-03-14 03:58:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f92e02e578699ba8407f220d7088011 SHA-1: 7cd849417c090383d563ed8dfbd869fd6a0768c4 SHA-256: 85c0a594a539bde0416a7545cafbe0420aeb881bea0ebb7516aa2fcae219f9ac
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it is likely part of an SEO link farm. The primary URL, 'https://bologen.ru/wix?keyword=minecraft+modding+for+dummies+pdf', suggests a lure to attract users interested in Minecraft modding. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=minecraft+modding+for+dummies+pdf
    • http://zofozefevuf.iblogger.org/senior_sales_manager_job_description.pdf
    • http://myyshooop227.site/m._b._a_di_full_formrs10j.pdf
    • http://dfds.in/how_long_do_you_cook_beef_jerky_in_dehydrator1pall.pdf
    • http://serdyukov.pro/dugomodeliwawigivdof6n.pdf
    • http://parrrtner.xyz/kibazojqgw9.pdf
    • http://vclean-sale.shop/zijaxapude14f6h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jamuluvuvava/n._c._r._b_full_form.pdf
    • http://zebigibozudival.epizy.com/billie_myers_kiss_the_rain_lyrics.pdf
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_d584273933d14a328d66ce0b23e2177d.pdf?index=true
    • https://s3.amazonaws.com/zomuzigo/super_street_fighter_2_turbo.pdf
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_8b2b9f48143f463886e24ec86f816322.pdf?index=true
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_2a4e3b54db324810890586a896e0c331.pdf?index=true
    • http://sevetise.rf.gd/pejirekibatadazu.pdf
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_2d7823e493d9417f872c60199cfec9ad.pdf?index=true
    • https://s3.amazonaws.com/wazotojemov/outlook_app_for_pc.pdf
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_7afe84a6759b4917991fbec7b3d0f1c4.pdf?index=true
    • https://s3.amazonaws.com/dixaleko/38971624899.pdf
    • http://jupasugego.rf.gd/how_to_clean_lint_filter_whirlpool_washing_machine.pdf
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_9fc35b8943ab49e0a02170754ef47413.pdf?index=true
    • http://kazibejega.epizy.com/givojifopulofafetowikazej.pdf
    • https://s3.amazonaws.com/dezajok/91623107527.pdf
    • https://s3.amazonaws.com/kosipefojaw/best_bike_racing_game_for_pc.pdf
    • https://s3.amazonaws.com/xewamejixolefaj/83904520064.pdf
    • https://s3.amazonaws.com/zobuwubedak/87719665238.pdf
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_7b2def4fd3d44e5c911ef300e73b80da.pdf?index=true
    • https://s3.amazonaws.com/rilexazejuzovep/android_arrayadapter_example_spinner.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb88.bin
d91039d6cee8aaaa153f813a80407ccd07011b85314abec45333e95c2c3da548		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 5448 bytes
font_01_sfnt_off0000fe09.bin
b6503f85c7e68b355e716c9cecff650d7592644ece2595f5d1e4bb56c1dfa4f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 11556 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.