Malicious PDF — malware analysis report

Static analysis result for SHA-256 f037e2e3f380f3d8…

MALICIOUS

PDF

380.8 KB Created: 2021-04-05 07:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8cdb1531f19376eae7c728e758432b8b SHA-1: 604bf950739c28cf38f8dec886c08af477c8de50 SHA-256: f037e2e3f380f3d8ffc68477e1b3755d2455ac71e595f6c9407d344eccda17d2
112 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language and a download button. It embeds an external URI pointing to a suspicious domain, which is likely the primary malicious payload delivery mechanism. No scripts were extracted from this sample, but the presence of the malicious URL and the phishing indicators strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=book+iv+obligations+and+contracts+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368238/normal_60668a38d0333.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445343/normal_5fccbeb07ac4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5feb0d8bca702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fc5f0211f235.pdfIn PDF document text
    • http://watewuwij.22web.org/after_we_collided_soundtrack_cd.pdfIn PDF document text
    • http://faniwojelanebe.22web.org/31867604234.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_602b3b49e4393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444374/normal_60281185323ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463532/normal_60241a25cee44.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/96914942150.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86f8cf5-ee7d-411a-8d00-08ac494bdf4b/star_trek_discovery_season_3_episode_6_review_ign.pdfIn PDF document text
    • http://litabasiker.onlinewebshop.net/bibetorifab.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/economist_september_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b0b57c-23d0-4929-bef1-14f5741d8d69/gypsum_association_fire_resistance_design_manual_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7655b1ef-5db8-471d-a44f-90cda9a0e061/trig_identities_and_equations_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/26036369707.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/roland_td4_drum_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bd1960b-d786-47d4-8f74-75b6da95b553/57697598432.pdfIn PDF document text
    • http://gowasikokini.epizy.com/gegodusedidakikonodajuje.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/chrysler_voyager_2004_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7a7326-a9b4-48d2-b7b2-6900f2392893/magick_book_4_liber_aba.pdfIn PDF document text
    • http://zemigubu.epizy.com/english_grammar_exercises_books_free_download.pdfIn PDF document text
    • http://tujukiji.rf.gd/bitten_imdb_parents_guide.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_off0005ac9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9E 5636 bytes
SHA-256: aa728fd97540f2de3331b696dd3b36faaf785ca0b067eadb7dc76d174de18d31
font_01_sfnt_off0005bfe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFE6 10540 bytes
SHA-256: 0ff01d3ac37eceb496f05817cb1caf08ac5aa019c926d9adeb083ad79ea72fa2

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