Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02a8968c09c44d8…

MALICIOUS

PDF

82.7 KB Created: 2021-03-28 19:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d899af281cdf6ec7e69cba46e7d66093 SHA-1: 900f4ecd5581f6c3636cc3569990b98436d0437b SHA-256: b02a8968c09c44d8fca9fea774f0eb53de3d0a7d8843d013b09f4e3a2b6308fb
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Bum bum bole song 320kbps', indicating a potential attempt to trick users into downloading malicious content. The presence of external URIs and the ML classifier's high confidence score strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pelibifir.ru/123?utm_term=bum+bum+bole+song++320kbps
    • https://kibugaduxabe.weebly.com/uploads/1/3/4/5/134510017/b76045f55c49fa.pdf
    • http://fegokodelaxen.scienceontheweb.net/47245135916.pdf
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/9646177.pdf
    • https://static.s123-cdn-static.com/uploads/4409098/normal_60070478c8e41.pdf
    • https://cdn.sqhk.co/bijukipuj/agghcig/67162286593.pdf
    • http://palitra-cveta.ru/data_management_specialist_salary53nhy.pdf
    • http://secret-empire.ru/14101114972u44in.pdf
    • http://groshyk.site/497531395096qyol.pdf
    • https://cdn-cms.f-static.net/uploads/4501046/normal_60245ce6e44ce.pdf
    • https://cdn-cms.f-static.net/uploads/4368230/normal_601e64717e9d1.pdf
    • https://cdn.sqhk.co/gesokusa/gcDhjg3/2_pics_1_word_game_online.pdf
    • http://janizejekifajab.medianewsonline.com/agile_software_development_principles_patterns_and_practices_free.pdf
    • https://cdn-cms.f-static.net/uploads/4451544/normal_606098f7bb124.pdf
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/feruruwev_jujaxukagafawox_nizawabawuv_pobobuses.pdf
    • http://instapriz.website/death_note_symbol_copy_and_pastej06d7.pdf
    • https://cdn-cms.f-static.net/uploads/4415331/normal_604055694104c.pdf
    • http://igonlinesupport.com/estimating_products_and_quotients_worksheets94w36.pdf
    • https://cdn.sqhk.co/japuwejede/i3bO5he/44179683914.pdf
    • https://cdn.sqhk.co/demapibo/Igcgdx0/search_quran_and_hadith.pdf
    • https://cdn.sqhk.co/tesigasefaxe/jj6Y4jh/62884191564.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://wanezezigemos.rf.gd/61323647821.pdf
    • http://dazulenaredon.rf.gd/carcinoma_basocelular_sclerodermiform.pdf
    • http://pivixukumapi.epizy.com/lexavekutomogenolexu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d9.bin
46ff501dd744ce592e21f1051d49c286561b5e00bdb05074ebd5cc783e20d951		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D9 6536 bytes
font_01_sfnt_off0000e603.bin
74022d769a3be45b16bf7611c8587199a3a6da6a07dfb7a7883016cfd29b66e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE603 5276 bytes
font_02_sfnt_off0000f7da.bin
17285167d5ab190828ee9a89419052094df4248e1bc26dc85d2b116b31ed3921		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 4452 bytes
font_03_sfnt_off000107b4.bin
bc1e297ec932851cd1cd3f5a71013aca2e31ba156e2f1561f463c80d476fe1d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107B4 11076 bytes
font_04_sfnt_off00012d73.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 4324 bytes

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