Malicious PDF — malware analysis report

Static analysis result for SHA-256 a890ea48a1501082…

MALICIOUS

PDF

90.0 KB Created: 2021-02-26 23:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fff746aaf553d7ac3456b4d45199bc64 SHA-1: f86a3f508088fe7390dc9341cc6016eb54c88bbd SHA-256: a890ea48a1501082d35260c8a9bbacb48155532aa46faf19d8c8c5cf385dbf09
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to game guides, likely to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=path+of+diablo+amazon+leveling+guide PDF link annotation
    • https://cdn.sqhk.co/pirujezexod/ehbACmQ/phone_d_likee_code_nedir.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/19241190711.pdfIn PDF document text
    • http://rexuwoxaga.sportsontheweb.net/new_moon_december_14_2020_meaning.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/formato_de_minuta_sac_con_directorio_aporte_bienes.pdfIn PDF document text
    • http://lagulatobir.iblogger.org/18800701460.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/bheiehc/file_manager_android_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/hygdjed/street_basketball_freestyle_vs_nba.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/casio_edifice_bluetooth_tough_solar_chronograph_watch_eqb-501d-1aer.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/fscQgfV/71678058304.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/what_season_of_vampire_diaries_did_elena_and_damon_break_up_in_real_life.pdfIn PDF document text
    • http://jidobefom.iblogger.org/happy_birthday_music_sheet_violin.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/58623995433.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/45416046694.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
    • https://s3.amazonaws.com/suzixegazunow/jatijotidi.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/37522998757.pdfIn PDF document text
    • http://kinamanerat.epizy.com/libro_business_model_generation_en_espaol.pdfIn PDF document text
    • http://damokoz.epizy.com/wadifimojijulu.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/gizefoperusonip.pdfIn PDF document text
    • http://muguvap.epizy.com/bisiwasalofapalajo.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/30602981889.pdfIn PDF document text
    • http://lufixov.epizy.com/engagement_invitation_psd_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/microsoft_access_2010_free_trial.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_off00011617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11617 5180 bytes
SHA-256: dfdcbff6e708efe5cbe08b390d10469ca55d397920a596aee9c3b9240bd28aae
font_01_sfnt_off000127ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127AB 10656 bytes
SHA-256: 6397b0d480a33ac7a75e8ec847d9eed7bb809b0385e87e0c123023e223aa2f9f
font_02_sfnt_off00014bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BED 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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