Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9bd87c1a8915da…

MALICIOUS

PDF

73.2 KB Created: 2021-03-08 12:38:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e4290b9d3d21e6c39d9747b7d1330e7f SHA-1: b44ce63e162dbe1fbe29aa9b00d6b58af441b343 SHA-256: ba9bd87c1a8915da3f4c813c62ad33aca42c357612392668b32831c81bae880d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, containing numerous external URIs. The primary malicious URL identified is 'https://soxebez.ru/wix?keyword=whatsapp+plus+mod+apk+v6.30+download', suggesting a lure for downloading potentially unwanted software. The document's structure and embedded links indicate it functions as a link farm, aiming to redirect users to various download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=whatsapp+plus+mod+apk+v6.30+download PDF link annotation
    • http://xudisoda.66ghz.com/vazobuluwejo.pdfIn PDF document text
    • https://bebibamo.weebly.com/uploads/1/3/1/4/131438385/3073076.pdfIn PDF document text
    • http://poguferuliwu.iblogger.org/64724503639.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/tefututulevi.pdfIn PDF document text
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/6864312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a1cfc67-5981-466d-a13b-75576fe7431f.filesusr.com/ugd/64e449_c4478e432d8b4a6dacf44ff3226331ac.pdf?index=trueIn PDF document text
    • http://wozojatoxako.epizy.com/vogagerosube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc14799-c5d0-4cb4-b412-7a2286c30148/how_to_say_someone_is_stressed_out.pdfIn PDF document text
    • http://sisizovomejefi.epizy.com/brahma_kumaris_murli_songs.pdfIn PDF document text
    • http://tokivatifizaxe.rf.gd/definicion_de_funcion_inyectiva_en_calculo_diferencial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a215fc2-293f-4ea2-a1e6-41ac45e9a810/22223239381.pdfIn PDF document text
    • http://vakebajenom.epizy.com/chelsea_derby_match_report.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/bukilozut.pdfIn PDF document text
    • http://nofugodevi.rf.gd/sizufobonupinegepixivujor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4392010d-a115-402f-9ec0-73694f375ff9/23931661905.pdfIn PDF document text
    • http://melaworogafema.epizy.com/warhammer_2_alith_anar.pdfIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_3429414eac7e487d997805f85cdf8da1.pdf?index=trueIn 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_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 5824 bytes
SHA-256: 549ccd9ad3b532200bfd19c24441e03f2bc42d9cc81fa04c1a5d0bd00a8fb53e
font_01_sfnt_off0000f4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FC 10224 bytes
SHA-256: 08260ec660b878186587f82a0678a9929b15eb85ec6dc6c5d140a225aaa2ba50