Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6c1c182502ba48…

MALICIOUS

PDF

74.2 KB Created: 2021-03-12 11:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e42775c6a79ebc90510b97d018cf9d57 SHA-1: 200d56deaec3f2fc3b46e3b5abb32724e3803f2e SHA-256: 5b6c1c182502ba485b05debb08dea7b758949311186d2cd0b83caefc4845a2e7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://gimoguvi.ru/wix?keyword=cherry+peppers+relish PDF link annotation
    • https://cdn.sqhk.co/ragebobeb/hdthlFx/music_line_drawing.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/85998615473.pdfIn PDF document text
    • https://sugopubix.weebly.com/uploads/1/3/1/6/131637077/jepewivifijugetiredo.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/yeh_shen_chinese_cinderella_summary.pdfIn PDF document text
    • https://bopegaxuz.weebly.com/uploads/1/3/1/4/131406849/7538168.pdfIn PDF document text
    • https://mutefalififide.weebly.com/uploads/1/3/1/3/131383766/ruputenutakolif.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/sazajadaraniwu.pdfIn PDF document text
    • https://vesedosaripiwuj.weebly.com/uploads/1/3/1/6/131636692/mumuxatulirid-zuzaso-pelatakili.pdfIn PDF document text
    • https://vexinafofonazes.weebly.com/uploads/1/3/1/8/131871992/gaviwigejezofowe.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuparit/f63gmM9/neha_kakkar_song_punjabi_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_383de512dfe8470f8936699212f058e0.pdf?index=trueIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/libuzuninijoga.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/analisis_sobre_la_pelicula_el_mundo_de_sofia.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/22276921165.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/how_do_i_login_to_wd_my_cloud.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/10841172829.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/article_format_apa.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/aeons_end_new_age_rules.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/sample_instructions_for_a_test.pdfIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_fbb4ff60e2ad410990c4f694e191a024.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/farmville_tropic_escape_game_guide.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_c51707eb2ddb4b6386cbf2cd55e05a72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/issuu_er_calameo_er.pdfIn PDF document text
    • http://naburonip.myartsonline.com/foreign_trade_and_balance_of_payment.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 4704 bytes
SHA-256: c75852e4b5eda4d4dd56bc5610b09c43e06ed3d8cb439ae9db8e75a81ab8d5be
font_01_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 10668 bytes
SHA-256: aa145c5be3c25929b8a9f9701b0ee14a65e9dbbd703a2a58fba7174df5299261