Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e490ab275a48a6…

MALICIOUS

PDF

84.2 KB Created: 2021-03-19 19:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9eded319dc4be330b02812694dbc284 SHA-1: d4c99ed50ad187454dc61f11888cb8046dd3f60b SHA-256: 89e490ab275a48a60dbc59bcae5387b2ecc967a8701f87d07dd623aafb0061f8
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of many external URIs suggests an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://golowaki.ru/123?utm_term=test+deep+link+android+emulator
    • http://reestr.site/29429730504kvkcf.pdf
    • http://itash.space/682631039394lnd6.pdf
    • http://erogancolumbia.site/fedutafavizodejalifowunuuf8ra.pdf
    • http://xenalebosob.scienceontheweb.net/31401965186.pdf
    • http://zogometemo.sportsontheweb.net/34296302374.pdf
    • http://sethel.xyz/big_mouth_and_ugly_girl_summary_chapter_21mdf7p.pdf
    • http://bopugafuwu.scienceontheweb.net/kenukozajuwupedadezule.pdf
    • http://zodatowafe.getenjoyment.net/best_onkyo_surround_sound_settings.pdf
    • http://kudikadip.getenjoyment.net/inauguration_speech_example.pdf
    • http://fukazab.mywebcommunity.org/let_us_create_man_in_our_image_meaning.pdf
    • http://vetobiz.sportsontheweb.net/wiwapobojabexifurevi.pdf
    • http://wabiferofuvud.mygamesonline.org/39513583355.pdf
    • http://dodajavux.scienceontheweb.net/automating_inequality_download.pdf
    • http://dotixomovi.sportsontheweb.net/how_to_fix_error_code_51330_on_the_wii.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gixiluvigatekij.atwebpages.com/selegidojexew.pdf
    • http://loxupobupibim.atwebpages.com/xuxewu.pdf
    • https://s3.amazonaws.com/samopakamefap/kekuwojemebonelibup.pdf
    • https://uploads.strikinglycdn.com/files/12a8a9de-5a61-4d2e-9eca-f9429bd86719/american_gods_season_1_episode_1.pdf
    • https://uploads.strikinglycdn.com/files/177a5455-a9ab-4c5b-ba6a-f94dcb35a8bc/93510317773.pdf
    • https://s3.amazonaws.com/gekixadonuru/58013175993.pdf
    • https://uploads.strikinglycdn.com/files/4e514ea3-041b-4a81-97fb-ffbbacf2b370/cowon_plenue_d2_best_price.pdf
    • https://uploads.strikinglycdn.com/files/5fca3b00-da59-432e-8b50-2501a6d2ae10/can_you_renew_your_permit_after_it_expires.pdf
    • https://s3.amazonaws.com/nelizenejakarug/love_breakup_images_hd.pdf
    • https://uploads.strikinglycdn.com/files/a8a30c4e-5c0a-4013-98ad-43880ec1d0f6/gebenegogeramonazadewul.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f53f.bin
c660c8b55850cc9c15fc2b36456c20e6b84cf0fc59d6454de43e5fb927831df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53F 5120 bytes
font_01_sfnt_off0001068f.bin
554e7413871043a87caa1435e2d1e7c604407e9d00aa21b3becedda51ec7436d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 11336 bytes
font_02_sfnt_off00012d98.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D98 16204 bytes

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