Malicious PDF — malware analysis report

Static analysis result for SHA-256 629be4d8a4a57aef…

MALICIOUS

PDF

76.0 KB Created: 2021-03-11 22:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7e4db5d0ce7b7ba4883cfd0f59e58aa9 SHA-1: cf6c392a4ef47da6888a666f8a92b0e4873666d5 SHA-256: 629be4d8a4a57aef32ce99281163d9378762a88678a9df93386ee342b057a0d7
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers as malicious. The document body, though heavily obfuscated, contains keywords related to accounting software, suggesting a lure to trick users into visiting malicious sites. No scripts were extracted, but the overall structure and heuristic firings indicate a likely attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • 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://seumenha.ru/123?utm_term=tally+busy+accounting+software+free PDF link annotation
    • https://cdn.sqhk.co/zofizitene/DMhd4kj/recargar_claro_prepago_pse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_600bc9fac9e32.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/how_to_buy_otc_market_stocks.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/motorola_model_sbg6580-g228.pdfIn PDF document text
    • https://cdn.sqhk.co/damukowabij/2ifBicE/61028203180.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/vuzopidow.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/iCGibBY/zeseteva.pdfIn PDF document text
    • http://pakimudemezir.iblogger.org/shinee_kpop_songs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5fe903550ce5f.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxilumevo/3igja1m/69946535077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_60400d4abd28a.pdfIn PDF document text
    • http://kogegoleteneka.iblogger.org/disororovevikibupulizasi.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/idJGgfY/89241860205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413583/normal_5fe2a94a35618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sajutab.rf.gd/gavedu.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_85fa292acbae46b29f3f931e3f039407.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_b862342cea2d47a8bed937872ca7dd44.pdf?index=trueIn PDF document text
    • https://63fde035-29f6-405b-9c66-a514c013759e.filesusr.com/ugd/4b68be_43704b7247df4d559b9fd66ee2f6d664.pdf?index=trueIn PDF document text
    • http://fakonin.rf.gd/what_is_the_opposite_of_inverse_matrix.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/how_to_calibrate_magic_chef_gas_oven.pdfIn PDF document text
    • http://ximogubofew.epizy.com/fuwoxujaw.pdfIn PDF document text
    • http://fegelefuxenitud.rf.gd/ranabezalijafewerereru.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/math_puzzles_for_adults_printable.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_910be6768b1a4081bebbb63c46447acc.pdf?index=trueIn PDF document text
    • http://kukadafimi.rf.gd/tumutozedoxi.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_14bbde91b1e5417993b73da5a5454b88.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 5332 bytes
SHA-256: 013afdd9df6e96560928bdb1b054deb443a13485b8974ea0261ce3a0839efc28
font_01_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 9804 bytes
SHA-256: da3369b45987ade59fbc02255265427be0e1820c3dc7929fb5065a40db730513

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