Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c30cf879d20516…

MALICIOUS

PDF

81.8 KB Created: 2021-03-22 21:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cc8df5139c9a9d7c296aa13c0d4c3c3 SHA-1: 9b481992a03379492efdd51f46a5783d620be737 SHA-256: 19c30cf879d20516139a61e9c331b492573fac9cd20683afa0cd981424d6ea58
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6432

Heuristics 4

  • 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 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
  • 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://ponafet.ru/award?keyword=cascade+refrigeration+system+pdf
    • http://zopokujejisolan.getenjoyment.net/10467389701.pdf
    • http://24goodstore.site/terapia_cognitivo_conductual_para_el_insomniovcoa1.pdf
    • http://roserubusigiwij.mywebcommunity.org/star_wars_aftermath_download.pdf
    • http://smirno.life/marsha_linehan_dbt_skills_training_handouts_and_worksheetsnx2f5.pdf
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/bozezojo_lupek.pdf
    • http://rowowevu.mypressonline.com/19499683517.pdf
    • http://wonizojaru.scienceontheweb.net/career_action_plan_template.pdf
    • http://ribadubeko.scienceontheweb.net/types_of_nouns_in_english_grammar_with_examples.pdf
    • https://gefotumazemi.weebly.com/uploads/1/3/5/3/135331531/2806962.pdf
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/02b9717.pdf
    • http://50off.pro/asrock_easy_driver_installeru2y76.pdf
    • http://tefitagesev.mypressonline.com/hp_laserjet_pro_100_color_mfp_m175nw_wireless_setup.pdf
    • http://frut-tree.site/65630642315bfpc.pdf
    • http://kismyketio.com/what_does_nec_stand_for_in_the_militaryg4m9x.pdf
    • http://ketadiets.site/casio_g_shock_wr20bar_manual_espaol5lt90.pdf
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/3466586.pdf
    • http://gazzsheff.xyz/wwe_smackdown_2020uzv36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jubogaju.atwebpages.com/60850556522.pdf
    • http://masemipeba.myartsonline.com/corel_draw_x5_all_shortcut_keys.pdf
    • http://jozizirepimetel.rf.gd/najavisexogusubo.pdf
    • http://vivimaga.epizy.com/acute_bronchiolitis_guideline_2014.pdf
    • http://mutodilevo.epizy.com/anita_o_anita_video_song.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115fa.bin
4ea9afd1a3543a9f7f0f78ca609839d19e5f405835ffcef4c8d4f348094c63e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115FA 2860 bytes
font_01_sfnt_off0001202d.bin
a323c40e3906ab3f55e6894ecdf4c1bbeb61256d3c9bd6441e739a0960b16453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 5448 bytes

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