Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3c07dcc7fe6a77…

MALICIOUS

PDF

74.6 KB Created: 2021-03-22 03:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e992131f27293927adf87d0632fcfbf4 SHA-1: d826268018783a7c612b86b17126ad98e226cd5b SHA-256: 1b3c07dcc7fe6a7747af71253dab050b63f458dcf01e9a458869dad344f7f5da
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier as malicious. It contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, suggesting a phishing or malware distribution attempt. The PDF's structure and embedded links align with techniques used to redirect users to malicious sites.

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 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://resalured.ru/strik?utm_term=the+secret+ingredient+hallmark+movie+cast
    • http://pamatidela.getenjoyment.net/67201849347.pdf
    • http://joxezorov.mywebcommunity.org/l_loge_du_carburateur.pdf
    • https://cdn-cms.f-static.net/uploads/4372376/normal_602c21e3449bf.pdf
    • https://cdn-cms.f-static.net/uploads/4485162/normal_5fe7887164d6b.pdf
    • https://cdn-cms.f-static.net/uploads/4479933/normal_6056dce0209ef.pdf
    • http://kevufeduwatawos.mypressonline.com/deadpool_vol_1.pdf
    • http://laulu-go.ru/917851673823zv5k.pdf
    • http://glawerry.online/xakesavufiweloliznrxql.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_edcba65fe82f43a8b66c993fa09b7167.pdf?index=true
    • https://s3.amazonaws.com/wibedubosateg/5744857649.pdf
    • https://s3.amazonaws.com/zuniverijesud/juwotudejapegotopines.pdf
    • https://uploads.strikinglycdn.com/files/d75c7ffa-733b-4f5b-b511-06d0e9b24b89/39317547659.pdf
    • https://s3.amazonaws.com/mesixadelomomo/final_fantasy_xv_characters_tv_tropes.pdf
    • https://uploads.strikinglycdn.com/files/c5e51a05-1744-4198-b2a9-b3b6d1ff2dd4/how_to_play_stacking_cups.pdf
    • https://s3.amazonaws.com/pogolo/38951284519.pdf
    • https://s3.amazonaws.com/xezonijida/fizik_saddle_fitting_guide.pdf
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_c4cde2146d214b239181ed35f3de571b.pdf?index=true
    • 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_off0000e4a1.bin
bb9cdabb14d488af3bd2748c1cf8e37df27630642788ecb6c678458a0ad45637		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 5424 bytes
font_01_sfnt_off0000f6f0.bin
b4543fbb53176c75fd0881317fa427a539a66ea7d38a7c262f2458e2c9505de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F0 11344 bytes

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