Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7a6cada650e33c…

MALICIOUS

PDF

86.0 KB Created: 2021-05-03 20:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cba87a08619254c8688ef83a49fd12d SHA-1: dc8eee1ce3a327115f20f327bffe3a776a881d92 SHA-256: 3a7a6cada650e33c84838c8beabda6bf9943d6a23a007d776fda53c3ff934738
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan and by a machine learning classifier. It contains numerous external links, with one pointing to a suspicious URL that appears to be part of an SEO link farm. The PDF's structure and embedded links suggest an attempt to redirect users to malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=line+6+firehawk+fx+effects+list
    • https://static.s123-cdn-static.com/uploads/4445125/normal_5fcfaf7a2428b.pdf
    • https://cdn.sqhk.co/sunomedude/iahaidj/15190699452.pdf
    • https://cdn.sqhk.co/jifigetuxu/hihiZAN/ben_and_holly_s_little_kingdom_colouring.pdf
    • https://static.s123-cdn-static.com/uploads/4458618/normal_6004daa0d0555.pdf
    • https://cdn-cms.f-static.net/uploads/4484612/normal_600d50b2cf92f.pdf
    • https://cdn-cms.f-static.net/uploads/4469370/normal_60162bb4690db.pdf
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5ff8d831b2fba.pdf
    • https://pupinalakarer.weebly.com/uploads/1/3/4/2/134234580/tesimumuredafo_gozasajozoluw_jelugufig_nuwakusuz.pdf
    • https://cdn.sqhk.co/vadavenaw/gfxhi5P/37848314479.pdf
    • https://rimokukesezawuk.weebly.com/uploads/1/3/1/4/131437069/8821218.pdf
    • https://cdn.sqhk.co/tivuzofep/ggqaOPC/nova_launcher_themes_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/somamere/jegokijo.pdf
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_3b8598d5e0064492b26f920b46b2b2a5.pdf?index=true
    • https://s3.amazonaws.com/megodipewukitoj/zuguwupaluvunumetefeba.pdf
    • https://s3.amazonaws.com/pegozegi/casino_games_free_slots.pdf
    • https://s3.amazonaws.com/fatikonavori/will_there_be_a_fallout_movie.pdf
    • https://s3.amazonaws.com/zusevamasor/bemisal_movie_mp4.pdf
    • https://s3.amazonaws.com/tomaxade/92340039851.pdf
    • https://s3.amazonaws.com/vawoginele/lasagna_sheets_recipe_indian.pdf
    • https://af4bb04d-41a2-413c-b691-ce0a46ff998d.filesusr.com/ugd/e677f8_6239dd5dfcf7440eb9e432ce646807e1.pdf?index=true
    • https://s3.amazonaws.com/sonutopexaramuf/bajar_musica_alta_calidad_android.pdf
    • https://s3.amazonaws.com/jijari/daxifek.pdf
    • https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_d448030cf3fe432384c59840e08cffd5.pdf?index=true
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_01a59f30c32a4ed8859e6399568f9d56.pdf?index=true
    • https://s3.amazonaws.com/tugumeb/jemisa.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011147.bin
07e0165724a778b1cf216a2ef5cf86b98b958b73a6dee6b9a2c7c1764932bbc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 5288 bytes
font_01_sfnt_off0001235b.bin
ae6a67b9f71d768b0c15fd36c8a3002be62ac4266df898b1b0cf3647aeb1725f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1235B 11020 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.