Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cc055bc9ef5ec0…

MALICIOUS

PDF

83.6 KB Created: 2021-05-12 02:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e36a2a25a85b86af200f8b4ce6c72165 SHA-1: d55cbb852f6ff5b28846eb4e50fa170436a68b23 SHA-256: e6cc055bc9ef5ec0c117bc1f09c288d6fb4960b1af9da14b88af83b1c666434e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/strik?utm_term=how+to+fix+recoil+spring PDF link annotation
    • http://faxagigotitij.66ghz.com/gegudumunaxejelo.pdfIn PDF document text
    • http://my-credit.info/377120580crdh0.pdfIn PDF document text
    • http://mscgis.net/guide_book_of_united_states_coinsanoz7.pdfIn PDF document text
    • http://help-verification.com/fifty_shades_of_grey_darker_full_movie_2016xg3uq.pdfIn PDF document text
    • http://maxist.ru/47284961011jpnyl.pdfIn PDF document text
    • http://justiciaforjustice.com/jefawazerojiir7vj.pdfIn PDF document text
    • http://lastasked.com/modelos_del_crecimiento_humanoodb22.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/diT4nhe/lozimavibimilobas.pdfIn PDF document text
    • https://cdn.sqhk.co/mavixuwaloz/Zhfixhe/adventure_escape_dark_ruins.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/is_the_white_princess_a_spinoff_of_the_white_queen55t48.pdfIn PDF document text
    • http://datinge.site/7167518192zhj1t.pdfIn PDF document text
    • http://healthit.space/if_clause_type_1_worksheet_printable2pwfr.pdfIn PDF document text
    • http://avto-trokot.xyz/how_old_was_brandon_burlsworth_when_he_diedhdgzo.pdfIn PDF document text
    • https://cdn.sqhk.co/zupololano/hajdhg3/cut_the_rope_2_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/hjhzmia/46311887678.pdfIn PDF document text
    • https://cdn.sqhk.co/dijobika/ic0ifij/koputapiburowuxipef.pdfIn PDF document text
    • http://thedouche.xyz/is_jojo_part_7_goodrr9i7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_bf223adfe4174712a934c67d8b44839e.pdf?index=trueIn PDF document text
    • http://zowisojaba.epizy.com/management_accounting_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_7ddb33e96bd3442a9280566191a632f9.pdf?index=trueIn PDF document text
    • http://fexunipeguzizu.rf.gd/apocalpticos_e_integrados_completo.pdfIn PDF document text
    • https://dca540c6-954d-4243-9f09-0921753db957.filesusr.com/ugd/974a4e_a79a6a7e7d7d4a1da8b301a1d243ae4d.pdf?index=trueIn PDF document text
    • http://labopum.rf.gd/levajaxodeju.pdfIn PDF document text
    • http://doruxujegajaso.rf.gd/fufuwifejamukoxoroxug.pdfIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_d3dcb293b43f42e5b23ab913570c6f23.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5092 bytes
SHA-256: e63e7313cb29fc8512939608e90bb680b00108a2d79d23047d39385507d82f9e
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 10372 bytes
SHA-256: 9571024ad8f59c7b7210e64996b303e6b85d8394693cb468f0440ceb9b20755e
font_02_sfnt_off00012b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B62 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8