Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f23a899417cbc4…

MALICIOUS

PDF

107.3 KB Created: 2021-06-02 12:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ef29d5c112f034973b6f974bae03ad SHA-1: e601e2855e0b81fe831f3a6d2b27ad42c46f366a SHA-256: 94f23a899417cbc4935b3e7291339977444e201ecf68336504c6a78d7abb2daf
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, suggesting a potential SEO manipulation or phishing campaign. The embedded URL 'https://chcial.ru/pbw?utm_term=how+to+connect+i12' is a primary IOC. No scripts were extracted, but the PDF structure and link farm suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/pbw?utm_term=how+to+connect+i12
    • https://javofosuzuvenew.weebly.com/uploads/1/3/4/5/134588543/7141433.pdf
    • https://mozesewopizudal.weebly.com/uploads/1/3/4/3/134363743/nadilududulovel-pefadegunabob.pdf
    • https://movojedafep.weebly.com/uploads/1/3/0/8/130814843/befubigogaso.pdf
    • https://nusupubibirimu.weebly.com/uploads/1/3/1/8/131871553/c35e07f5ff2d.pdf
    • https://jetizapu.weebly.com/uploads/1/3/4/3/134371104/6875123.pdf
    • https://cdn-cms.f-static.net/uploads/4408485/normal_5fe8484c21245.pdf
    • https://kovapuneluwaze.weebly.com/uploads/1/3/2/3/132302913/lediripanazudid.pdf
    • https://cdn-cms.f-static.net/uploads/4381104/normal_604899011e23f.pdf
    • https://cdn-cms.f-static.net/uploads/4372080/normal_60535ce66d2aa.pdf
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/81a2091885.pdf
    • https://cdn-cms.f-static.net/uploads/4480893/normal_605d334174e79.pdf
    • https://rubuvewoxuvima.weebly.com/uploads/1/3/4/8/134873715/panix_wimiwoda_gabagozopiga.pdf
    • https://kuwujevo.weebly.com/uploads/1/3/4/8/134864034/pufapakefumipitikad.pdf
    • https://cdn-cms.f-static.net/uploads/4388165/normal_605805b236378.pdf
    • https://cdn-cms.f-static.net/uploads/4413848/normal_603c0df2638f3.pdf
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fe64d63964d3.pdf
    • https://tumirovuwepilu.weebly.com/uploads/1/3/4/6/134603677/7c9500ab4.pdf
    • https://static.s123-cdn-static.com/uploads/4489241/normal_5ff4983704bc9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://uploads.strikinglycdn.com/files/874cb5e5-2ff4-4c0b-8c80-4cc43819c205/american_standard_ac_model_number_lookup.pdf
    • https://uploads.strikinglycdn.com/files/044f86bb-149c-4073-a832-f396ef49ee1b/sony_bravia_32_inch_full_hd_led_tv_price_in_india.pdf
    • https://uploads.strikinglycdn.com/files/8ef1f6c9-2a1a-47a8-8889-ad022469332a/2348746650.pdf
    • 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
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129d8.bin
4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 2960 bytes
font_01_sfnt_off00013448.bin
26c0dc20173489e75d228fc0771a2a4b185439c92623fb916982192e7f70dbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13448 4516 bytes
font_02_sfnt_off000143c8.bin
85fd2af6e8def76b1573c72003a062db82107b108d08e656347b9b024e018991		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C8 7128 bytes
font_03_sfnt_off00015720.bin
b747c645e2abd8efea6054be76a4df7fa572545e50c0e2f2df6399e81d3808b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15720 15320 bytes
font_04_sfnt_off0001880b.bin
4682b72f2afa33b20cf875d84024ffdd6778cb348d5560ed491e7fe37e149525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1880B 16192 bytes

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