Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0beae3ab83c2e0…

MALICIOUS

PDF

77.2 KB Created: 2021-02-25 08:51:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f1e4d199197f1fcead579959db46f45d SHA-1: ccbbeaa709e274b33383578456bb3f15adcf25df SHA-256: ab0beae3ab83c2e00d670a3495f25784c808d7f6d377aea787fdc7a3c44c83c5
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs and a link farm structure suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to software downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/strik?utm_term=elm327+mini+interface+software+download PDF link annotation
    • http://freud.icu/gipizezazelogipne4q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382643/normal_60066435d1a3e.pdfIn PDF document text
    • http://useporte.xyz/ederson_clean_sheets_eplk3sx0.pdfIn PDF document text
    • https://cdn.sqhk.co/vuluzazogur/chbje9V/batman_the_enemy_within_full_walkthrough.pdfIn PDF document text
    • http://zarabatyivat.ru/neon_text_png_online9oftq.pdfIn PDF document text
    • http://menformula.xyz/sekoserenawanijo0ht.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/dqY2idk/45099461731.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/jbhjjiH/assistive_touch_iphone_se_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/iimwjdL/clash_of_kings_mod_apk_free_download.pdfIn PDF document text
    • http://nefuwumimo.iblogger.org/3848667035.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/cMiemid/itty_bitty_piggy_lyrics_az.pdfIn PDF document text
    • http://dkblogin-de.best/466064415033uwn4.pdfIn PDF document text
    • http://ridiriwefu.iblogger.org/wamegewomazixotox.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/fhcggTP/who_died_in_haikyuu.pdfIn PDF document text
    • http://ca-manalapan.space/agneepath_songs_list_freeaekje.pdfIn PDF document text
    • http://romeita.space/bebovusla123.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/hdhgOu8/76160948762.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nemebikox.epizy.com/using_subordinate_conjunctions_worksheet.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/chapter_15_psychological_disorders_test_answers.pdfIn PDF document text
    • http://velumosak.epizy.com/57118144127.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_off0000f0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 5592 bytes
SHA-256: 45536b35e1f647ffe29ccf01e7248152bef06258a384d85b98141709f7178bff
font_01_sfnt_off000103dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DC 10412 bytes
SHA-256: 9aa07a15dffa5bd7f262949d7fbc5112f3cb17f85a9c06deb999485880dbfd3a

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