Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b6f60c97039cdc…

MALICIOUS

PDF

79.8 KB Created: 2021-04-19 16:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0326c9d7269bed91789b454850f5ef5e SHA-1: ea7d44002663b260bc5128ff5d656738e03df033 SHA-256: 54b6f60c97039cdca4fb9fcb47119758424df0d1be81dfa8dee13789ca2f5a2c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('jacksth.ru') and containing a 'utm_term' parameter suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to 'Eva luna telenovela capitulo 100', indicating a social engineering pretext to drive users to the malicious link.

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://jacksth.ru/strik?utm_term=eva+luna+telenovela+capitulo+100 PDF link annotation
    • https://cdn.sqhk.co/javeduner/hhWibhj/hallelujah_leonard_cohen_song.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/gjbdpib/12223478228.pdfIn PDF document text
    • http://rastet-malysh.ru/sesamodobowuvibigomanebeps8tn1.pdfIn PDF document text
    • http://mydenverneighborhoods.com/nizegigujutevoxonoxi09d0u.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/Yjh2pcY/24059532409.pdfIn PDF document text
    • http://gojuvop.iblogger.org/argo_movie_hdpopcorn.pdfIn PDF document text
    • http://rizaxezo.iblogger.org/37903939892.pdfIn PDF document text
    • http://onesmall.space/anime_vietsub_apkpure1wh6r.pdfIn PDF document text
    • http://vuzaretozo.iblogger.org/rebugowi.pdfIn PDF document text
    • http://remontnatali.ru/kovedodonetubilegpmear.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bamiwuvobazom.rf.gd/new_cutting_edge_elementary_download_free.pdfIn PDF document text
    • http://putatufene.rf.gd/how_to_follow_directions_in_school.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_2888e5414e3c43299cc626ad45d94469.pdf?index=trueIn PDF document text
    • http://niziziv.epizy.com/oxford_bookworms_library_starter_dead_man_s_money.pdfIn PDF document text
    • http://milulizoxozeb.rf.gd/dave_ramsey_fpu_workbook.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_717cb476933242438f320b24b9a38835.pdf?index=trueIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_332c38bfdf574aa18540ea9338d89f50.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_f918bba5712549748f5b682ccb1ddbe3.pdf?index=trueIn PDF document text
    • https://ce322291-b3da-4cc2-ae0f-523e25daec44.filesusr.com/ugd/4530da_223ef060d7424e86a209456280375bc3.pdf?index=trueIn PDF document text
    • http://vobafuge.epizy.com/sirogukubu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 4748 bytes
SHA-256: 29d2b5391c0e1ed6cb93902aa21398a2784327b32fe32f160cbc9f5b3d14dc4e
font_01_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 10800 bytes
SHA-256: 51d8e23994e99d6aa85ff7b3ae34ddb638e4e288b83637eed6ab2221fc373174
font_02_sfnt_off000123f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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