Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e9997816198f78…

MALICIOUS

PDF

86.2 KB Created: 2021-05-10 07:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90c532dfb4155ac092bce2892d1531e1 SHA-1: 5465acf7f0aaee0aad4a8976b8c1618f4600faed SHA-256: 56e9997816198f78136d22a11ea2e6bb3cb1f47816b31c894898de79f96ffa1a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=most+popular+vcs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456699/normal_5fd379ab536fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_604cecf759801.pdfIn PDF document text
    • http://vedevejunogi.iblogger.org/zajeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465705/normal_60540f6b6c51b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_601d59f2a526f.pdfIn PDF document text
    • http://zozegakipuvi.iblogger.org/critical_thinking_skills_assessment.pdfIn PDF document text
    • https://rutelixiriselop.weebly.com/uploads/1/3/4/7/134748314/mojapajer_rawaratonabulel.pdfIn PDF document text
    • https://nijenemal.weebly.com/uploads/1/3/4/4/134465501/1aca9.pdfIn PDF document text
    • http://dovogonusiru.iblogger.org/anemia_perniciosa_laboratorio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakorizu.epizy.com/critical_thinking_download.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/76655499366.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/46416771002.pdfIn PDF document text
    • http://resisimokopi.epizy.com/84632885168.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/vojivigikolo.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/xuwazowitokajadofa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/love_story_movie_mp3_song_download_bestwap.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/atomic_blonde_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/labavididexo.pdfIn PDF document text
    • http://tujukiji.rf.gd/75857017676.pdfIn PDF document text
    • http://gesulobanaxa.rf.gd/dosinivox.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_off0001151d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151D 4992 bytes
SHA-256: a139410ba356ebcc7e6f591fa966143c13323467bbb734dbc4c1ad3d74e58c5c
font_01_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 10912 bytes
SHA-256: 2adc5c898b35f598b3f76225c3b674704cfab175da9b917c536b92731aa00653