Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f4c631a7a6cc7f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-19 21:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dc1c1708231aa4587d4fbd3b34996e96 SHA-1: d33945b9f32a84d00ecf3125d3ab7825c5d0ad20 SHA-256: e1f4c631a7a6cc7f95a7213eb86beed6d709421c7dc9cfdc5437c9ffc9fc8a2e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. The document body and extracted URLs suggest a lure related to 'survive the end days pdf download', aiming to trick users into clicking on numerous external links, many of which are hosted on suspicious domains. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest an attempt to distribute further malicious content or engage in link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/wix?keyword=survive+the+end+days+pdf+download PDF link annotation
    • https://cdn.sqhk.co/nadipozow/ighfjf0/45659809977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_601d9b7f96a0f.pdfIn PDF document text
    • https://nexirexosevexos.weebly.com/uploads/1/3/4/5/134500935/a7bad.pdfIn PDF document text
    • https://cdn.sqhk.co/jozojonujaj/gSwPgv6/citra_3ds_emulator_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ghiijbA/dancing_on_my_own_chords_piano_robyn.pdfIn PDF document text
    • http://daddytestit.xyz/quem_tem_um_porqu_enfrenta_qualquer_comonaaq2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473656/normal_604e9d5f58cd9.pdfIn PDF document text
    • http://grafoanaliz.ru/ginenulivopofituziwezidugjwcb6.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/gjADIhf/tier_list_creator_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/flQjjl1/chest_freezer_costco_hisense.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/13ac35d3f685f8f.pdfIn PDF document text
    • https://pudabesipewoz.weebly.com/uploads/1/3/0/9/130969441/60fd41e8dcc1fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_60446478681f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453334/normal_5fd60f7624019.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/capitalize_words_in_google_sheetsiffg1.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/4000323.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/cc1f69fd0263f.pdfIn PDF document text
    • http://libralab.digital/hurt_by_christina_aguilera_mp3_downll9od1.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/vovopafubipu/burger_king_logopedia.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/chul_soon_transformation.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/2012_hollywood_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/marrakech_souk_shopping_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/monstrosity_synonyms_in_english_and_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/automated_forex_trading_platforms.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_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 5484 bytes
SHA-256: eea4744baf46e5f93b062d83a43d2c844be9f539633457a16eb3e01a40774bb0
font_01_sfnt_off00010de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE6 11368 bytes
SHA-256: 11060515b5356138139f236029c4885b354c72f039e0e4506df1fccd2390f03b

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