Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ff1cea0854bcaa…

MALICIOUS

PDF

71.8 KB Created: 2021-05-04 11:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b81e36a046fed68ea95cf9709b92304a SHA-1: e9ead2072bd415ac05657bb5784f11740f650d4b SHA-256: d5ff1cea0854bcaaa3ce2901f16c9f41c58ce83aed90625b96fb321bb10effb0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to disposable hosting, and one primary URL, 'https://soxebez.ru/strik?utm_term=apple+magic+mouse+2+price+in+pakistan', which is likely used for phishing or to distribute further malware. The document body, though heavily obfuscated, suggests a lure related to product pricing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://soxebez.ru/strik?utm_term=apple+magic+mouse+2+price+in+pakistan
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/sutujebu-waluvipevatiz.pdf
    • https://static.s123-cdn-static.com/uploads/4455916/normal_6000c17a62ace.pdf
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5ffd671a91c06.pdf
    • https://cdn-cms.f-static.net/uploads/4413244/normal_601281fc76015.pdf
    • https://cdn-cms.f-static.net/uploads/4476780/normal_6047ade7f1f2e.pdf
    • https://cdn-cms.f-static.net/uploads/4474988/normal_604191276fe1f.pdf
    • https://cdn-cms.f-static.net/uploads/4449769/normal_60452c19899c4.pdf
    • https://cdn-cms.f-static.net/uploads/4465556/normal_606cd7f49ccb4.pdf
    • https://sijaxidav.weebly.com/uploads/1/3/4/4/134499987/6992088.pdf
    • https://xikixunajaxata.weebly.com/uploads/1/3/5/9/135959014/d6eed30da1ee44.pdf
    • https://cdn-cms.f-static.net/uploads/4426550/normal_605079b5f2f60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://db532842-334f-4efb-8993-e67ec8f20ff5.filesusr.com/ugd/bc5be3_8d58cbd69a6049e3a142fcc15275b703.pdf?index=true
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_680ae429101344c9abe97fb042809511.pdf?index=true
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_1ac5b665fdfd4e808f07d8e500e8fec5.pdf?index=true
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_2a04e31f2e0b475ab095802577070c74.pdf?index=true
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_09b33890b58244e0ace798d82db6a203.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_2d8ae132c9394ebc806ae37767fa824e.pdf?index=true
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_6481c7b794fb4e21860270fd387468d5.pdf?index=true
    • https://38c8c62e-1823-4c1e-8220-bc61efcc8a1c.filesusr.com/ugd/c24b9b_bb991f21fcad46ad9490ff9852fdf88e.pdf?index=true
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_bd05a9da09364d5e84f5858c7942c8d9.pdf?index=true
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_c27584f9b3ac44e7a63dc901673b4bc2.pdf?index=true
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_3ed227cc3a9b4e1ba426636c9679c46e.pdf?index=true
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_cd04b7ba9ec449678e304d69d7654b5f.pdf?index=true
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_bee0cc35ccd24d248e4259b4c26812b7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8ea.bin
12a5f1d7ee7d85d7a1931b8f238d5c13c28ac6c9cae25217eaf16fb2c0a1d4f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5440 bytes
font_01_sfnt_off0000eb59.bin
c7b1fd09c0de3378e1249e3aa984ac2649b6d4e4927473379382feac555039f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB59 11400 bytes