Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e02197aa1376fe4…

MALICIOUS

PDF

78.8 KB Created: 2021-05-07 13:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4fa16b2931b767aef9227f3b46b59c1e SHA-1: 12ad8563ecd53f6223e43fdc1bce9ad05b3c71ed SHA-256: 3e02197aa1376fe42ae268c5bac196af1bb7236de423553b606bd92fee267d96
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/strik?utm_term=what+does+it+mean+to+sign+under+penalty+of+perjury PDF link annotation
    • https://bawufavipefal.weebly.com/uploads/1/3/0/7/130740211/e95d6a1fc3d4.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/78d483.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/eshhihC/second_hand_clothing_stores_southern_suburbs_cape_town.pdfIn PDF document text
    • https://sopoxovolofu.weebly.com/uploads/1/3/4/5/134509961/disonuwe.pdfIn PDF document text
    • https://jelozenodi.weebly.com/uploads/1/3/0/7/130739120/3183462.pdfIn PDF document text
    • https://cdn.sqhk.co/nemizuxe/jimFWja/23346188903.pdfIn PDF document text
    • https://pomorewosijimop.weebly.com/uploads/1/3/2/6/132681296/dozanux.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzudumijamo/wjayEOi/candy_crush_saga_game.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/ifo5hhx/packers_final_score_last_night.pdfIn PDF document text
    • http://terugate.mypressonline.com/que_es_un_trastorno_alimenticio.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/how_to_see_street_view_on_google_maps_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/CidChgb/virgin_radio_top_40_2020.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/6382334.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/tokyo_ghoul_review_season_3.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://zenulasomizin.epizy.com/bevogulotivono.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/openerp_7._0.pdfIn PDF document text
    • http://lukoleni.epizy.com/neoplasma_pada_payudara.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/gibipilefumelidizuvuk.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/saxiz.pdfIn PDF document text
    • http://wokesoz.epizy.com/12730022050.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/cookery_10_teaching_guide.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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 5528 bytes
SHA-256: 527bfa79c6ff21cc333c53ff6fdaa2c340f7cb7b09d82aec4eed1702ccad8a0c
font_01_sfnt_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10588 bytes
SHA-256: ced7de9ae60e7f5311a05b6556df76d55a5fbe888c6b421f28f63cccf683ba51
font_02_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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