Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f8a667697c6050…

MALICIOUS

PDF

74.5 KB Created: 2021-04-15 11:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f3ad42a9680f4e5766bdd20b025b6cbb SHA-1: 8bf371470a717016d9b9990a05888896b0371c82 SHA-256: 59f8a667697c6050a7e803ce3bc0150a647ac388057dd169ba5a6c12b2d188a6
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with a phishing lure designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=experience+human+development+13th+edition+pdf+free PDF link annotation
    • http://sumigemag.mywebcommunity.org/luxumegosavunexesixa.pdfIn PDF document text
    • http://gejejasofubi.mywebcommunity.org/zitojotezokapet.pdfIn PDF document text
    • http://thehensleys.org/4776045268ocsgp.pdfIn PDF document text
    • http://todayshop.website/game_bully_apkpure2cugk.pdfIn PDF document text
    • http://veronaital.space/6120106399700ucv.pdfIn PDF document text
    • http://bonboxstudio.com/1n4007_datasheet_fairchilduecuf.pdfIn PDF document text
    • http://tersq.fun/the_big_short_full_movie_in_hindi_onlineanyob.pdfIn PDF document text
    • http://kfcrabota.ru/9961864172olbc2.pdfIn PDF document text
    • http://furniture21.online/dojuvizu5e8c5.pdfIn PDF document text
    • http://naturalm.space/dinosaur_fighting_war_games_3da8rnq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/43017801605.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/xozulizaxuxetox.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/who_is_the_best_stock_market_analysis.pdfIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_b7b98d88a55642da800793669f8f88f4.pdf?index=trueIn PDF document text
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_f0baf355e94c4028b74d709f5189a4ee.pdf?index=trueIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_e2d1657aecae49e885bade97908c1b59.pdf?index=trueIn PDF document text
    • https://ef733714-782c-48ea-8991-1bc0bf0c95f2.filesusr.com/ugd/ad2ade_51d88d738cef4c31855792e0c9239fa8.pdf?index=trueIn PDF document text
    • http://zuputes.atwebpages.com/clicks_catalogue_august_2020.pdfIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_2cdaed85c9fe4c159c9dac1101dda45c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/indesign_free_templates_flyer.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_ba48a971f66e46309e63612bac23dcd1.pdf?index=trueIn PDF document text
    • http://sawurawefivovo.myartsonline.com/calaveras_para_pintar.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_off0000e5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DE 5516 bytes
SHA-256: fc190be8f82ebb923a055527602c461fcf9e7497a770df90a5f6b89944a73d50
font_01_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10444 bytes
SHA-256: cbe7bf51829571abae2bbfc93788ebd76d0ccf63b6cf5d2ed5290bd10658078a

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