Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c490a7449d650c4…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 02:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 38917d9d1d442ec884b222c29beb48c1 SHA-1: 9aeae2c502d2dfdb73ba78e1b2eca9d2577fa494 SHA-256: 0c490a7449d650c4a55543cafe94531a0744a52dd50a3587dd8b49890c716679
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wix?keyword=cultural+ethnography+essay+examples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371508/normal_60033674ae821.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/babette_s_feast_short_story.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/acupuncture_point_combinations_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fdb6c11e1045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_6056401bd393a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_6023aea466a5b.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/boxorowome.pdfIn PDF document text
    • https://tobevasisutigi.weebly.com/uploads/1/3/0/8/130814636/wifag.pdfIn PDF document text
    • https://cdn.sqhk.co/tolononof/hfgeohb/tug_the_table_download_game_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_6033a3e180679.pdfIn PDF document text
    • https://cdn.sqhk.co/kinerufi/h0jbRms/56431703424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_6040211d05b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_601d7532a2eb5.pdfIn PDF document text
    • http://punejew.mygamesonline.org/wuluwabasa.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/xSkhdhd/ee_bond_calculator_future.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/XGeZger/subway_princess_runner_free_download.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/learn_to_draw_books_for_5_year_old.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batiku/gijinomot.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/dakararodolal.pdfIn PDF document text
    • http://pabizex.atwebpages.com/sewing_machine_needle_charts.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/27774316066.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/bharti_axa_car_insurance_transfer_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/apache_http_server_for_windows.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_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 5308 bytes
SHA-256: 191419dc2b95dfbe732bf88351675c51e0e2ad8e105bf0a2c2f66b495a0f1f43
font_01_sfnt_off0000ff0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0F 11072 bytes
SHA-256: 113607e415b92da012c884dba9a7fb7060ea5309a3fcd18702d1134eac4901bd