Malicious PDF — malware analysis report

Static analysis result for SHA-256 89edd2f2632f5652…

MALICIOUS

PDF

79.0 KB Created: 2021-03-30 01:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 316ac738196955ae2c9a9505a28ee31b SHA-1: 268d3e8c317e82f416f3682a381e7b2aeaa7f5bc SHA-256: 89edd2f2632f565235ca67a81ad66e7092e41a44d234378f25061e1ca5ac6b98
126 Risk Score

Malware Insights

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

The PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to an air conditioner manual, likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=daewoo+nano+silver+air+conditioner+manual PDF link annotation
    • https://cdn.sqhk.co/kopozufu/Ojhr6ij/bbq_restaurants_near_me_dine_in.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/BjaVWjb/nojamakilon.pdfIn PDF document text
    • http://xokodiraki.22web.org/biztalk_server_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372384/normal_5fef7a8166fb6.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/1922e2563915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465267/normal_602f8d2770bc4.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/wondershare_dr._fone_android_data_recovery_free.pdfIn PDF document text
    • https://bisigategisabuv.weebly.com/uploads/1/3/4/8/134884720/1768606.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/pemixosapetezimajuxa.pdfIn PDF document text
    • http://wajulosuju.22web.org/how_to_stop_climate_change_essay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fe8e65f5010d.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/nhhtpRT/11543632268.pdfIn PDF document text
    • http://mutodute.22web.org/kajeb.pdfIn PDF document text
    • http://jerusitujuj.22web.org/minority_report_movie2free.pdfIn PDF document text
    • https://pubogovivewata.weebly.com/uploads/1/3/2/3/132302724/2187346.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/defipedibe/34415918029.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/58039336188.pdfIn PDF document text
    • http://tolojusoju.rf.gd/adobe_animate_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/54380093832.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/gofofaxetewutibawe.pdfIn PDF document text
    • http://peburameg.epizy.com/cancer_de_pulmon.pdfIn PDF document text
    • http://wofajigu.rf.gd/61913264418.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/sizemogumifabasepadav.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/adding_mixed_fractions_with_common_denominators_worksheets.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_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 5236 bytes
SHA-256: b528d8e9fc8481e28114a4b344422597d648490e5a307d88a5388e163b9ec2f5
font_01_sfnt_off000108b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B2 10576 bytes
SHA-256: 79bb68f4cc6549840cca9972b35d134b87c65bc696746e8f33cee0bab7475b4e

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