Malicious PDF — malware analysis report

Static analysis result for SHA-256 5363e9f1e31b2d7c…

MALICIOUS

PDF

85.0 KB Created: 2021-03-14 20:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eceac38ff0c70d6768d806e425baca3e SHA-1: 9af4460b79678c3b8986db9b02d0e03732035ea5 SHA-256: 5363e9f1e31b2d7cbbc30b013c472979d88fd2bfbdacc5ec7bc37eee5d811301
156 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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains numerous external links, with the primary malicious URL being https://vilenefex.ru/strik?utm_term=life+application+study+bible+app+crack. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=life+application+study+bible+app+crack
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/fufekunadogaj.pdf
    • https://cdn.sqhk.co/xezojutatow/ZheWthb/relaxing_sleep_music_nature_sounds.pdf
    • http://mopowataxix.medianewsonline.com/44343119352.pdf
    • https://cdn.sqhk.co/numiwuzuwix/iXjhjfl/2935906638.pdf
    • https://kezofufilulo.weebly.com/uploads/1/3/4/4/134488682/bixigom.pdf
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/3372195.pdf
    • http://reetodo.online/zogazevutovu3akwm.pdf
    • https://cdn.sqhk.co/lezenelu/ibif4cQ/smith_s_pharmacy_phone_number_heber_city.pdf
    • http://yazansoft.com/musicas_internacionais_top_50_global_download97wk3.pdf
    • http://dimax-matrasy.ru/airbus_cmlmkzem.pdf
    • https://cdn.sqhk.co/lojadisexudo/Ihgibib/sobedajuga.pdf
    • https://munipepuxorikoz.weebly.com/uploads/1/3/0/9/130969311/fokaxawibo.pdf
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/fuxolakizax_daroxabuvododuf_majowono.pdf
    • https://cdn.sqhk.co/soxuvezosapa/9xgdejj/71214586625.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_f8f68465145f4cce919ad9c59b8b3caf.pdf?index=true
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_33efb0a86d8649e3b553a6fe1eb0250f.pdf?index=true
    • http://rosevasejila.myartsonline.com/bosch_silence_plus_dishwasher_wont_start.pdf
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_02de903db8ea4dda9b38bc84216d8e83.pdf?index=true
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_ece0a991e3cd441cbbe61afa81545b52.pdf?index=true
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_191f47b8f4c9452cb2da532d86799889.pdf?index=true
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_239254c0e994449ab92e15363b741700.pdf?index=true
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_89109b18a8494fd5a2fd3ed4f3363e17.pdf?index=true
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_587a617bd65d4d5a98745ff40d32b48f.pdf?index=true
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_7fcd1fb937ae42c98f3aed0e35f2f5dd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fff7.bin
4db282ab2d29f787c693ad06a42486ab2aa8e0b93f5e36e38de58181991cf2c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 5280 bytes
font_01_sfnt_off000111f3.bin
dab64526b75ee9ecc42191ec361f63107f90ca00ca1f03f2e2aafc283fd5dd78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F3 10752 bytes
font_02_sfnt_off0001366f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1366F 4324 bytes

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