Malicious PDF — malware analysis report

Static analysis result for SHA-256 117bdac2e362ebd5…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 19:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 60e5a2f80f95b32b2009a49842244c25 SHA-1: 41ac7a8b7bccbcc6ea8c6f4ae36865b4c17c16cb SHA-256: 117bdac2e362ebd544cf27a931eb9fca4adc997931d4dac00b6fe8209c5186c8
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains and are likely part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/wix?keyword=atomos+y+moleculas+ejercicios PDF link annotation
    • http://ctuxuu.com/56020517404rwoht.pdfIn PDF document text
    • http://hesap-al-sat.com/is_qigong_better_than_tai_chiwzpk4.pdfIn PDF document text
    • http://rentline.pro/cars_movie_songs_mp3_downloadkqvkz.pdfIn PDF document text
    • https://tonezesonor.weebly.com/uploads/1/3/2/6/132681734/abd53.pdfIn PDF document text
    • http://idealicait.website/literature_review_template_excelyrq80.pdfIn PDF document text
    • https://labegemi.weebly.com/uploads/1/3/4/7/134709462/vipeputugok-taxirojovizipo-disumefifop.pdfIn PDF document text
    • https://lugigotaxur.weebly.com/uploads/1/3/0/9/130969655/nuzivuditenomoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jadigilotuziwir.rf.gd/54246807506.pdfIn PDF document text
    • http://netozovozuze.rf.gd/pilujuxaxufivo.pdfIn PDF document text
    • https://3d7304b5-8527-495f-b913-615d6f357a43.filesusr.com/ugd/ef7486_c2f26652de03486fa45d746dc11a3210.pdf?index=trueIn PDF document text
    • http://xoxerulegud.epizy.com/80178387835.pdfIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_d2ff76e719714dbcac52636643fbf2e5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/07cf219b-9d9b-4ca5-8aac-341bdcd4e9bf/patixisofa.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_4ecc8f65e13d478d94d3b5de895714c1.pdf?index=trueIn PDF document text
    • http://luwatejanif.epizy.com/87484103433.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_9da3c718a01247fa96913e6cb7fbf890.pdf?index=trueIn PDF document text
    • http://gexibaw.rf.gd/how_to_deal_with_reverse_psychology.pdfIn PDF document text
    • https://6a24fdd2-d4a5-4c4b-882b-0f3115751bcf.filesusr.com/ugd/04e6f9_4b1ddbcd9f574b0099069a33c6dc7d9c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a19bc8e-50d6-47fb-b4ca-7b3495151d1b/asrock_z87_pro3_drivers.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_1b7789c608514c67973dd1cd21828181.pdf?index=trueIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_400ba10479ed4b2399b162cbe97c5f4e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa880baf-2743-4245-a7d6-e3298a3a9856/34490162899.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 5112 bytes
SHA-256: 1c365a78f01c013944e05dcc19e2251d535a988a84204df20b8f7387e83a2845
font_01_sfnt_off0000fbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB6 12064 bytes
SHA-256: cf0aca456cc1bbcf17a82661e43eb0f54d4e3c7d5216702a126fdc3af3ae1e30