Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8d89b2ab72e2cd…

MALICIOUS

PDF

82.5 KB Created: 2021-04-06 23:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2eba2017a0709166c9fc62dc979c629b SHA-1: 3d4cba10c2ba005de4a3167efcc0f8c214662ede SHA-256: 1a8d89b2ab72e2cd10c9f41657359ac8dc35acf8e2adb56015fd385715393886
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and one specific URL (`https://jottigo.ru/strik?utm_term=what+is+the+setup+key+on+spectrum+remote`) is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, appears to be a lure related to 'spectrum remote setup key', aiming to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=what+is+the+setup+key+on+spectrum+remote PDF link annotation
    • http://trackengine.host/99877846450x47td.pdfIn PDF document text
    • http://activa-fb.com/how_much_is_the_bbg_sweat_appnii9d.pdfIn PDF document text
    • https://roxagidu.weebly.com/uploads/1/3/4/7/134748987/zumitufigex.pdfIn PDF document text
    • http://power-guard.shop/tobolovaborepuxuwxglbb.pdfIn PDF document text
    • http://fartook.online/884629128328pt04.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/zitemojibejugivukane9b0zu.pdfIn PDF document text
    • http://butuvaguji.iblogger.org/what_is_a_scientific_apparatus_definition.pdfIn PDF document text
    • http://healthit.space/38496871204488gi.pdfIn PDF document text
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/511f77fd0.pdfIn PDF document text
    • http://xewojufedizeno.iblogger.org/lolagukoretedewewizimew.pdfIn PDF document text
    • http://werenntaq.online/35942186584drcnw.pdfIn PDF document text
    • http://andyhongdigital.com/barfi_movie_all_song_ringtoneudqvw.pdfIn PDF document text
    • http://spainsale.pro/2021_tesla_model_3_for_sale_near_meokkvk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5fc70ea8945bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_603a607645e38.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/bovenuraxezexuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484380/normal_5fcc2199bc59b.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/1404271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_600d4c43cdb1d.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://tevisub.rf.gd/62041874131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78509b12-bfb1-4920-8e3f-a63b9707e74f/84932894636.pdfIn PDF document text
    • http://fexunipeguzizu.rf.gd/drdo_ceptam_9_a_a_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5bff16-2e62-4572-acf1-7474ed2131f2/how_to_crochet_mittens_step_by_step.pdfIn PDF document text
    • http://wolasuwalijite.epizy.com/82635507457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf65cfee-a881-423b-a5d5-98341035f87f/how_to_use_a_mophie_wireless_charging_pad.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_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 5204 bytes
SHA-256: c6570a702cbb643a24f50b2da214e8bd96939d1355be13c2be48b5ea160b2677
font_01_sfnt_off00010a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1C 10456 bytes
SHA-256: eecb2ee5602ba713c189e8d3bb7ccb978c05210e1e52f184a14ed3cfd1a58cca
font_02_sfnt_off00012def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEF 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f