Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f86091dcbc6650e…

MALICIOUS

PDF

151.0 KB Created: 2021-03-31 19:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ed4592ea2dd75befae0f37f32558072 SHA-1: 50066bd17b00f78c05e34c474e41e71dcb99fa64 SHA-256: 7f86091dcbc6650ea68cbcd47471c144758ab1e359dbc402d50635b1513b1cde
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's content is designed to defraud users by promising a prize or funds contingent on a fee or further action. The presence of embedded URLs, such as https://xezojetit.ru/strik, suggests the document may attempt to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://xezojetit.ru/strik?utm_term=what+are+latin+maxims
    • http://lazotub.mywebcommunity.org/que_es_biopsicosocial.pdf
    • https://cdn.sqhk.co/zojixemem/jcji3hi/highlight_cover_maker_for_instagram_story_mod_apk.pdf
    • http://povulofi.mywebcommunity.org/metodologia_de_la_investigacion_cientifica_hernandez_sampieri.pdf
    • https://cdn.sqhk.co/xumirikebixo/jidYih4/selatisifubok.pdf
    • https://cdn.sqhk.co/bubiwalifeda/cM1RPhe/jepemezad.pdf
    • https://cdn.sqhk.co/banifiga/jyhbnVx/pigemofapijupusatafazu.pdf
    • http://mofopafilubo.22web.org/19664172649.pdf
    • http://kazaxukiga.getenjoyment.net/xuvokamalufevufafexa.pdf
    • http://xinupavob.iblogger.org/wesapesokozusibasuxuf.pdf
    • https://cdn.sqhk.co/benibavagoge/ePs1jea/70581849442.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://novupomajanox.atwebpages.com/letemurafanifupisowitefa.pdf
    • https://s3.amazonaws.com/tujeviwakirawu/navatixobozopevatarox.pdf
    • http://rabuxevemut.rf.gd/gba_emulator_iphone_free.pdf
    • https://s3.amazonaws.com/fukezavazuj/90017573222.pdf
    • https://s3.amazonaws.com/novipaliwid/defisesenesunonexe.pdf
    • http://ligunatiresid.epizy.com/goderuveduwuwupezufawilis.pdf
    • http://xidiredojowezi.epizy.com/herbal_encyclopedia_with_pictures.pdf
    • https://s3.amazonaws.com/xomudufe/spanish_verb_tenses_book.pdf
    • http://wukusagabibumaz.rf.gd/32942936146.pdf
    • https://s3.amazonaws.com/somisilegex/awdhesh_premi_ka_gana_karna_hai.pdf
    • http://lizifolojefomaw.epizy.com/death_note_netflix_movie.pdf
    • https://s3.amazonaws.com/bepukuba/49927989503.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020fb1.bin
17a40f65b48e9493ef73809f72e42e57dd339c286fd57b09b43a454c1d634f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20FB1 5004 bytes
font_01_sfnt_off00022096.bin
dc6dda343f99344b0aab715955c0369e350e6b5b3a4ce8cf07c2c1e74e59155c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22096 13752 bytes

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