Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fb38abe2e6c1aa…

MALICIOUS

PDF

82.0 KB Created: 2021-03-10 20:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6df34d9f92bd90ec9d6ccb88115b7b37 SHA-1: 12fb475fdf5a506a1535d61693ec5fd1e16e671d SHA-256: 75fb38abe2e6c1aab7f3b3d728f9b7c90dc176d8f5a65aa67431b729c0bc049f
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, characteristic of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest the document is part of a campaign to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/aws?utm_term=recoleccion+y+organizacion+de+datos+estadisticos+pdf
    • https://cdn.sqhk.co/xajamenujo/na8Ahc7/27452861241.pdf
    • http://usersdeviceprotectionservice.site/download_naruto_moviexahyl.pdf
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/dulapetejevis.pdf
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/xavosuposuz.pdf
    • http://kalukawuwo.mygamesonline.org/h20_mop_x5_replacement_pads_australia.pdf
    • http://dezimazokuxulil.mygamesonline.org/dark_souls_3_marry_anri_ending.pdf
    • http://vovality.club/20735008734wguio.pdf
    • http://salleop.xyz/zedifotadax52u0r.pdf
    • http://vurujupafowutox.mypressonline.com/69066829459.pdf
    • https://cdn-cms.f-static.net/uploads/4417206/normal_601d22aa22549.pdf
    • https://cdn-cms.f-static.net/uploads/4469378/normal_6046544877fb5.pdf
    • https://cdn.sqhk.co/numavagoko/Igcjjhe/condado_puerto_rico_hotels_on_the_beach.pdf
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/panuvozobenu.pdf
    • https://static.s123-cdn-static.com/uploads/4386837/normal_5fdd7f1a813ad.pdf
    • http://prod-fruit.space/dibujos_de_caras_faciles_paso_a_pasocl0qr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gupojakami/basara_ps2_android.pdf
    • https://s3.amazonaws.com/devuxuzejozam/39868061517.pdf
    • https://s3.amazonaws.com/luramamelolem/54162455656.pdf
    • https://s3.amazonaws.com/zifozujiwi/75663199610.pdf
    • https://s3.amazonaws.com/tixedujegibex/tudubili.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_off0000ff7e.bin
b50097a74839b804bb4b64bfa92959f66f7a590eb7022c88a8509b7d9dd2f671
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 5480 bytes
font_01_sfnt_off00011249.bin
3597a3e6525079db3444375c2f60ab3d8bde9047d819f4573c0774d4be0ffdbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 11868 bytes