Malicious PDF — malware analysis report

Static analysis result for SHA-256 057d182ffb26fa1c…

MALICIOUS

PDF

72.7 KB Created: 2021-03-09 06:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f17451bb95e7b2c7a9fd9ff1d74e0896 SHA-1: 93dad2d4b0afb4fd56b2a7a5ee7991fc0776fb84 SHA-256: 057d182ffb26fa1c64716288bf43d1fbc664850471a8c2d6bce9381784cd9a40
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body, though heavily obfuscated, contains keywords related to the malicious URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=turkey+gobble+ringtone+app In PDF document text
    • http://nadurejiw.22web.org/how_to_install_pygame_in_python_3.6.2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_600ff5f3611ca.pdfIn PDF document text
    • http://legezunoj.22web.org/how_much_does_a_trim_carpenter_charge.pdfIn PDF document text
    • http://nofunaxo.22web.org/pomigepibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_601200db7265c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454665/normal_6002bfe67849c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450260/normal_5ff6a8c042e96.pdfIn PDF document text
    • http://purigoguwoz.22web.org/69867096370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_603516f916626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipotunopadilez.rf.gd/make_your_own_website_google.pdfIn PDF document text
    • http://danidarexixuw.epizy.com/carbon_footprint_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/4381878633.pdfIn PDF document text
    • http://bukinajomo.epizy.com/cant_app_apple_store.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_ac117ee00a564479a7afb63ab8957bd9.pdf?index=trueIn PDF document text
    • http://pamiwumewamem.epizy.com/satuzusaxemefujuvis.pdfIn PDF document text
    • http://temitugefowe.epizy.com/turkish_march_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/tax_form_for_sale_of_business.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_2f22d6af3d4e42ae9b4261e64c0d1bae.pdf?index=trueIn PDF document text
    • http://womopemi.epizy.com/g_shock_rangeman_price_in_kuwait.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_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 5064 bytes
SHA-256: d77a1d93ef8476dbfd0ce1d1a592e37382b889f71f3e573554a62ff643666df1
font_01_sfnt_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 10456 bytes
SHA-256: c4750a8add9e5d26a455729823692ce2f62df11915d1b815d4a4781bb9c40be8

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