Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfe2fe9c24c64d7…

MALICIOUS

PDF

77.3 KB Created: 2021-02-25 19:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f307544877e3c7acdf0c83517003ed0c SHA-1: 2cb79d2a819b647436fc37d17ce603b5b0dd85a9 SHA-256: 0cfe2fe9c24c64d71b14af314c2726b6d2cd8c55f4fe46a3e0bfbdbff7c8356a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs disguised as document content, pointing to disposable domains. Heuristics indicate this is a link farm designed to redirect users, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=what%20are%20the%20steps%20in%20writing%20a%20critique%20paper PDF link annotation
    • http://copyrighthelp.info/70106753113zl43a.pdfIn PDF document text
    • http://healsmall.space/lerivasozosisopezufabawelch6xn.pdfIn PDF document text
    • http://cmbespaceclient.xyz/sebibugirunufaxarurc78bg.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/college_algebra_accuplacer_practice_test.pdfIn PDF document text
    • http://nazhivy.net/14237464001fr6s6.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/what_comes_on_a_burger_king_crispy_chicken_sandwich.pdfIn PDF document text
    • http://wide-mean.top/bogam7rlve.pdfIn PDF document text
    • http://ig-mediateam.net/fender_mustang_iv_v2_reviewosmeu.pdfIn PDF document text
    • http://raifaisentapp.online/volkswagen_amarok_v6_manual4wr3y.pdfIn PDF document text
    • http://gbo.guru/alcatel_2019g_g_mobile_phone_user_manualta3r3.pdfIn PDF document text
    • http://libertinemodels.com/68075091860kn942.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/tecknet_ipad_keyboard_instructions.pdfIn PDF document text
    • http://neo-tp.ru/insanity_max_30_workout_calendarz429j.pdfIn PDF document text
    • http://milesnires.xyz/basketball_trading_cards_value_freeneyly.pdfIn PDF document text
    • http://hookup671.site/fixed_term_employment_contract_template_freeuogpf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://satawakerexe.atwebpages.com/char_broil_4_burner_gas_grill_prices.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 5164 bytes
SHA-256: 230482b3906770dc7342ed8ca17ab796bd70d97b35c2cac0d8bfd75ba74b104d
font_01_sfnt_off0000f6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C1 10176 bytes
SHA-256: 87f4e30e7bfc9746a54a40dc9881c8b29dcda3d53e6028958b83ebafc6966dc5
font_02_sfnt_off000119af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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