Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdecf9dad9cbc02…

MALICIOUS

PDF

109.3 KB Created: 2021-04-27 00:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a1d4123b44f9ff735e1d97e0698fd300 SHA-1: 2e165b7ce299ae1c330c45b5e745ae987a74c37c SHA-256: 5cdecf9dad9cbc023042a3438523d293fa86831ab180800871d05bc44c01d39f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'jottigo.ru' and a search term related to 'Snow White'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed to host many links on disposable domains, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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
  • 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://jottigo.ru/strik?utm_term=snow+white+with+the+red+hair+episode+23 PDF link annotation
    • http://boomerangoo.site/pevojuxigufivosozeruz05xmi.pdfIn PDF document text
    • http://artdebug.site/alla_prima_oil_painting_techniquesdcfvo.pdfIn PDF document text
    • http://devlp.club/nancy_drew_games_ranked_tumblr5cw9l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386622/normal_604989e43f701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411944/normal_6007dc9835779.pdfIn PDF document text
    • http://libralab.digital/hacked_app_store_androidbmsmf.pdfIn PDF document text
    • https://cdn.sqhk.co/gufemazibafi/jiwkJfA/logo_quiz_expert_level_12_answers.pdfIn PDF document text
    • http://cleanup-sale.site/angular_7_formcontrol_set_value9ztza.pdfIn PDF document text
    • http://avit0.cc/wididonutetitafucb0dp.pdfIn PDF document text
    • http://obuv-kozha.ru/good_basketball_plays_for_high_schoolwp3kg.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/UggifBc/wagaxalamimimok.pdfIn PDF document text
    • http://air-calm2.club/splash_screen_android_library9yzlc.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/Ycjeujj/jujixujojowakofulapatimi.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/JMn8ihP/38387849533.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/sjfqujj/real_money_slots_no_deposit_bonus_usa.pdfIn PDF document text
    • http://lnstagram-office.com/44812244005kz9ui.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_4b788f580cd04badbdd6bbeb2536afc7.pdf?index=trueIn PDF document text
    • https://1423d76f-a56f-4481-bf87-726e17039346.filesusr.com/ugd/14aee2_203d2fefe3f24a9899a3204882d39c17.pdf?index=trueIn PDF document text
    • https://e6c529cc-411f-4195-b5ea-7b5fd081490a.filesusr.com/ugd/b7ab08_2d4688340aca4384bc3a6821139a872c.pdf?index=trueIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_2c19baa963a046d2ab218365831259d6.pdf?index=trueIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_0c47b2ec8e7b442e832df114546ee4b1.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 7776 bytes
SHA-256: a9b38a1d11d38c7d6fecdc8118e025cc9c07ae9601d46970d108115da684988a
font_01_sfnt_off000132ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EC 5504 bytes
SHA-256: d8473a101d3df40d9ca8fb6fbe652e1d6698a7c71858b1936c89c56bcaff0174
font_02_sfnt_off000145a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A3 7800 bytes
SHA-256: 0cde150f0f9487b8917965e9b9e1db020d2155f9ad8ba7c928f624bb6c22cd44
font_03_sfnt_off00015b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B22 14152 bytes
SHA-256: efd94c909a73e50141d50609d94c99611cfd6b587fd28ed6a97ba42cfdb94b07
font_04_sfnt_off0001880a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1880A 18848 bytes
SHA-256: 97aae09e9a8d206f9a13b0c8d62b5c7416a98ed310130d689f115504af5f2ef9